Split (1)

train · 987k rows

title stringlengths 10 172	question_id int64 469 40.1M	question_body stringlengths 22 48.2k	question_score int64 -44 5.52k	question_date stringlengths 20 20	answer_id int64 497 40.1M	answer_body stringlengths 18 33.9k	answer_score int64 -38 8.38k	answer_date stringlengths 20 20	tags list
Fastest way to merge 2 dictionaries, if one dict's key equals to the other dict's values?	40,069,059	<p>Suppose I have 2 dictionaries</p> <pre><code>dict1 = {(1,1,1) : ('abc'), (2,2,2) : ('def')} dict2 = {('abc') : (1,2,3), ('def') : (4,5,6)} </code></pre> <p>What is the fastest way to produce a dict 3 such that</p> <p><code>dict3 = {(1,1,1):(1,2,3), (2,2,2):(4,5,6)}</code>?</p>	0	2016-10-16T10:01:51Z	40,069,123	<p>You can use a dictionary comprehension:</p> <pre><code>dict1 = {(1,1,1) : ('abc'), (2,2,2) : ('def')} dict2 = {('abc') : (1,2,3), ('def') : (4,5,6)} dict3 = {k: dict2[dict1[k]] for k in dict1} >>> print dict3 {(2, 2, 2): (4, 5, 6), (1, 1, 1): (1, 2, 3)} </code></pre> <p>This iterates over the <em>keys</...	2	2016-10-16T10:11:18Z	[ "python", "dictionary" ]
count the number of groups of consecutive digits in a series of strings	40,069,151	<p>consider the <code>pd.Series</code> <code>s</code></p> <pre><code>import pandas as pd import numpy as np np.random.seed([3,1415]) p = (.35, .35, .1, .1, .1) s = pd.DataFrame(np.random.choice(['', 1] + list('abc'), (10, 20), p=p)).sum(1) s 0 11111bbaacbbca1 1 1bab111aaaaca1a 2 11aaa1b11a11a11 3 1ca11...	3	2016-10-16T10:14:38Z	40,069,177	<p><strong>UPDATE:</strong> the idea is first to replace all consecutive groups of digist with single <code>1</code> and then delete everything which is not <code>1</code> and finally get the length of the changed string:</p> <pre><code>In [159]: s.replace(['\d+', '[^1]+'], ['1', ''], regex=True).str.len() Out[159]: 0...	4	2016-10-16T10:18:01Z	[ "python", "pandas" ]
count the number of groups of consecutive digits in a series of strings	40,069,151	<p>consider the <code>pd.Series</code> <code>s</code></p> <pre><code>import pandas as pd import numpy as np np.random.seed([3,1415]) p = (.35, .35, .1, .1, .1) s = pd.DataFrame(np.random.choice(['', 1] + list('abc'), (10, 20), p=p)).sum(1) s 0 11111bbaacbbca1 1 1bab111aaaaca1a 2 11aaa1b11a11a11 3 1ca11...	3	2016-10-16T10:14:38Z	40,069,202	<p>This was my solution</p> <pre><code>s.str.replace(r'\D+', ' ').str.strip().str.split().str.len() </code></pre> <p><strong><em>100,000 rows</em></strong></p> <pre><code>np.random.seed([3,1415]) p = (.35, .35, .1, .1, .1) s = pd.DataFrame(np.random.choice(['', 1] + list('abc'), (100000, 20), p=p)).sum(1) </code></p...	2	2016-10-16T10:21:00Z	[ "python", "pandas" ]
count the number of groups of consecutive digits in a series of strings	40,069,151	<p>consider the <code>pd.Series</code> <code>s</code></p> <pre><code>import pandas as pd import numpy as np np.random.seed([3,1415]) p = (.35, .35, .1, .1, .1) s = pd.DataFrame(np.random.choice(['', 1] + list('abc'), (10, 20), p=p)).sum(1) s 0 11111bbaacbbca1 1 1bab111aaaaca1a 2 11aaa1b11a11a11 3 1ca11...	3	2016-10-16T10:14:38Z	40,069,408	<p>PiRSquared and MaxU solutions are great.</p> <p>However, I noticed <code>apply</code> is usually a bit faster than using multiple string methods.</p> <pre><code>In [142]: %timeit s.apply(lambda x: len(re.sub('\D+', ' ', x).strip().split())) 1 loop, best of 3: 367 ms per loop In [143]: %timeit s.str.replace(r'\D+'...	4	2016-10-16T10:46:29Z	[ "python", "pandas" ]
Setting diagonal mirroring via Jython (user to set points)	40,069,185	<p>Trying to get my my head around this program we need to create What is needed is as per the notes: create a function named arbitraryMirror() that allows the user to place a mirror at an arbitrary angle, causing an intersect and therefore mirror the image.</p> <p>This will need to be done on either a square or recta...	2	2016-10-16T10:18:28Z	40,079,399	<p>I do not have an answer for you but would love to know myself</p>	1	2016-10-17T05:59:38Z	[ "python", "jython", "jes" ]
Setting diagonal mirroring via Jython (user to set points)	40,069,185	<p>Trying to get my my head around this program we need to create What is needed is as per the notes: create a function named arbitraryMirror() that allows the user to place a mirror at an arbitrary angle, causing an intersect and therefore mirror the image.</p> <p>This will need to be done on either a square or recta...	2	2016-10-16T10:18:28Z	40,079,852	<p>The key formulas are (python):</p> <pre><code># (x0, y0) and (x1, y1) are two points on the mirroring line # dx, dy, L is the vector and lenght dx, dy = x1 - x0, y1 - y0 L = (dx2 + dy2) ** 0.5 # Tangent (tx, ty) and normal (nx, ny) basis unit vectors tx, ty = dx / L, dy / L nx, ny = -dy / L, dx / L # For each...	1	2016-10-17T06:33:19Z	[ "python", "jython", "jes" ]
Is there a more Pythonic/elegant way to expand the dimensions of a Numpy Array?	40,069,220	<p>What I am trying to do right now is:</p> <pre><code>x = x[:, None, None, None, None, None, None, None, None, None] </code></pre> <p>Basically, I want to expand my Numpy array by 9 dimensions. Or some N number of dimensions where N might not be known in advance!</p> <p>Is there a better way to do this?</p>...	1	2016-10-16T10:23:24Z	40,069,249	<p>One alternative approach could be with <code>reshaping</code> -</p> <pre><code>x.reshape((-1,) + (1,)*N) # N is no. of dims to be appended </code></pre> <p>So, basically for the <code>None's</code> that correspond to singleton dimensions, we are using a shape of length <code>1</code> along those dims. For the fir...	0	2016-10-16T10:26:49Z	[ "python", "arrays", "numpy", "multidimensional-array" ]
getting an int from a list (pygame)	40,069,295	<p>i am trying to make a 'snake'-like game in python. My problem right now is that I can't use the defined values from my 'coinlist' in my for-loop. This is the error that i receive if i execute it: TypeError: 'int' object is not subscriptable. Thanks for your help. </p> <pre><code>import pygame import random pygame....	0	2016-10-16T10:32:25Z	40,069,353	<p>You're appending ints to coinlist (rx and ry are random ints from 10 to 790/590) and later on you're trying to access elements within coinlist as if they are arrays.</p> <p>Consider doing something like replacing</p> <pre><code>coinlist.append(rx) coinlist.append(ry) </code></pre> <p>with</p> <pre><code>coinlist...	3	2016-10-16T10:39:18Z	[ "python", "for-loop", "pygame" ]
Pandas: sep in read_csv doesn't work	40,069,307	<p>I try to <code>read_csv</code> </p> <pre><code>e29bea24f74b7fb26cb9c14ef8c3b10b,ozon.ru/context/detail/id/33849562,2016-03-27 01:08:43,16,,Ð Â Ð¡âºÐ Â Ð â¦Ð Â ÐÂ»Ð Â ÐÂ°Ð Â Ð²ââÐ Â Ð â¦-Ð Â Ð¡Ð Â ÐÂ°Ð Â Ð¡âÐ Â ÐÂ°Ð Â ÐÂ·Ð Â Ð¡âÐ Â Ð â¦ e29bea24f74b7fb26cb9c14ef8c3b10b,ozon.ru/context/detail/id/2474...	-1	2016-10-16T10:33:17Z	40,079,302	<p>It works on my laptop.</p> <p>What's your pandas version? Is your file encoded as UTF-8? Can you try if this work?</p> <pre><code>df = pd.read_csv( 'pv-lena11.csv', sep=',', header=None, names=names, quoting=0, encoding='utf8') </code></pre>	0	2016-10-17T05:49:59Z	[ "python", "pandas" ]
cv2.imread() gives diffrent results on Mac and Linux	40,069,346	<p><code>cv2.imread(JPG_IMAGE_PATH)</code> gives different arrays on Mac and Linux. </p> <p>This may be because of the reason described <a href="http://docs.opencv.org/2.4/modules/highgui/doc/reading_and_writing_images_and_video.html?highlight=imread#imread" rel="nofollow">here</a> (see Note).</p> <p>Is there any sol...	1	2016-10-16T10:38:55Z	40,069,673	<p>you can build opencv & libjpg from source in both linux & mac. Using cmake you can build opencv with libjpg support (from source code). Hope this will give you same result.</p> <pre><code>cmake -DWITH_JPEG=ON -DBUILD_JPEG=OFF -DJPEG_INCLUDE_DIR=/path/to/libjepeg-turbo/include/ -DJPEG_LIBRARY=/path/to/libjpe...	0	2016-10-16T11:21:36Z	[ "python", "opencv" ]
I can not parse html using xpath and lxml library	40,069,358	<p>I`m using Python 3.5. I want to get a list of synonyms from the site, with the help of XPATH, but I do not get the required html code and get "[]".</p> <pre><code>import lxml.html word=input("Input your word: ") url = "http://www.thesaurus.com/browse/{word}?s=t.html".format(word=word) html = lxml.html.parse(url) sy...	-1	2016-10-16T10:39:35Z	40,069,541	<p>Just imagining you need Synonyms extracted :</p> <pre><code>import requests from lxml import html source = html.fromstring(((requests.get('http://www.thesaurus.com/browse/wordy?s=t.html')).text).encode('utf-8')) print (source.xpath('//div[@class="synonym-description"]//text()')[3].strip()) </code></pre>	-1	2016-10-16T11:04:16Z	[ "python", "python-3.x", "parsing", "xpath", "lxml" ]
I can not parse html using xpath and lxml library	40,069,358	<p>I`m using Python 3.5. I want to get a list of synonyms from the site, with the help of XPATH, but I do not get the required html code and get "[]".</p> <pre><code>import lxml.html word=input("Input your word: ") url = "http://www.thesaurus.com/browse/{word}?s=t.html".format(word=word) html = lxml.html.parse(url) sy...	-1	2016-10-16T10:39:35Z	40,069,572	<p>The xpath-syntax is case sensitive:</p> <pre><code>syn = html.xpath("//div[@id='filters-0']") print(syn) </code></pre>	0	2016-10-16T11:08:31Z	[ "python", "python-3.x", "parsing", "xpath", "lxml" ]
Pywin32 Working directly with Columns and Rows like it would be done in VBA	40,069,371	<p>I am starting to migrate some of my VBA code into Python, because it gives me more resources. However I am having troubles to work in similar way.</p> <p>I wanted to clear some Columns, however I cannot work directly with the attribute Columns of the worksheet. And I have to do turnarounds like this (full code):</p...	0	2016-10-16T10:41:36Z	40,072,190	<p>Simply run: <code>sh.Columns("A:D").Clear</code>. It should be noted that you are not translating VBA code to Python. Both languages are doing the same thing in making a COM interface to the Excel Object library. Because the Office applications ships with VBA, it is often believed that VBA <em>is</em> the language f...	1	2016-10-16T15:50:22Z	[ "python", "excel", "win32com" ]
How to accept only 5 possible inputs	40,069,487	<p>In my program I have a menu that looks like this:</p> <pre><code>MenuChoice = '' while MenuChoice != 'x': print("Type 1 to enter the first option") print("Type 2 to enter the second option") print("Type 3 to enter the third option") print("Type 4 to enter the fourth option") print("Press x to quit") try: Menu...	-2	2016-10-16T10:58:01Z	40,069,593	<p>You're right to use a <code>while</code> loop, but think of what condition you want. You want only the numbers 1-5 right? So it would make sense to do:</p> <pre><code>MenuChoice = 0 print("Type 1 to enter the first option") print("Type 2 to enter the second option") print("Type 3 to enter the third option") print("...	1	2016-10-16T11:10:31Z	[ "python", "error-handling", "menu" ]
How to accept only 5 possible inputs	40,069,487	<p>In my program I have a menu that looks like this:</p> <pre><code>MenuChoice = '' while MenuChoice != 'x': print("Type 1 to enter the first option") print("Type 2 to enter the second option") print("Type 3 to enter the third option") print("Type 4 to enter the fourth option") print("Press x to quit") try: Menu...	-2	2016-10-16T10:58:01Z	40,069,888	<p>I think he needs a While true loop . Did using python 2.X</p> <pre><code>import time print("Type 1 to enter the first option") print("Type 2 to enter the second option") print("Type 3 to enter the third option") print("Type 4 to enter the fourth option") print("Press x to quit") while True: try: print ...	0	2016-10-16T11:48:36Z	[ "python", "error-handling", "menu" ]
I am taking Selenium error	40,069,518	<pre><code>Using 1 seconds of delay Traceback (most recent call last): File "instaBrute.py", line 142, in <module> main() File "instaBrute.py", line 136, in main driver = webdriver.Firefox(profile) File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/firefox/webdriver.py", line 135, in __...	-3	2016-10-16T11:02:00Z	40,069,955	<p>Choose appropriate version of the driver from <a href="https://github.com/mozilla/geckodriver/releases" rel="nofollow">this page</a>, download and unarchive it, then place to the directory your script is located at.</p>	0	2016-10-16T11:55:37Z	[ "python", "selenium" ]
How to save split data in panda in reverse order?	40,069,551	<p>You can use this to create the dataframe:</p> <pre><code>xyz = pd.DataFrame({'release' : ['7 June 2013', '2012', '31 January 2013', 'February 2008', '17 June 2014', '2013']}) </code></pre> <p>I am trying to split the data and save, them into 3 columns named "day, month and year", u...	1	2016-10-16T11:05:54Z	40,069,602	<p>Try reversing the result. </p> <pre><code>dataframe[['year','month','day']] = dataframe['release'].str.rsplit(expand=True).reverse() </code></pre>	0	2016-10-16T11:11:26Z	[ "python", "pandas" ]
How to save split data in panda in reverse order?	40,069,551	<p>You can use this to create the dataframe:</p> <pre><code>xyz = pd.DataFrame({'release' : ['7 June 2013', '2012', '31 January 2013', 'February 2008', '17 June 2014', '2013']}) </code></pre> <p>I am trying to split the data and save, them into 3 columns named "day, month and year", u...	1	2016-10-16T11:05:54Z	40,069,615	<p>You could </p> <pre><code>In [17]: dataframe[['year', 'month', 'day']] = dataframe['release'].apply( lambda x: pd.Series(x.split()[::-1])) In [18]: dataframe Out[18]: release year month day 0 7 June 2013 2013 June 7 1 201...	2	2016-10-16T11:13:41Z	[ "python", "pandas" ]
how can i fix AttributeError: 'dict_values' object has no attribute 'count'?	40,069,585	<p>here is my <a href="http://pastebin.com/tzPpqE97" rel="nofollow">code</a> and the text file is <a href="http://www.dropbox.com/s/2bklv7p4ylq8wur/web-graph.zip?dl=0http://" rel="nofollow">here</a></p> <pre><code>import networkx as nx import pylab as plt webg = nx.read_edgelist('web-graph.txt',create_using=nx.DiGrap...	-1	2016-10-16T11:09:38Z	40,069,610	<p>The error is obvious <code>dict_values</code> object has no attribute <code>count</code>. If you want to count the number of unique values, the best way to go is using a <code>collections.Counter</code></p> <pre><code>from collections import Counter in_hist = Counter(in_degrees.values()) </code></pre>	0	2016-10-16T11:13:05Z	[ "python", "python-3.x", "networkx" ]
how can i fix AttributeError: 'dict_values' object has no attribute 'count'?	40,069,585	<p>here is my <a href="http://pastebin.com/tzPpqE97" rel="nofollow">code</a> and the text file is <a href="http://www.dropbox.com/s/2bklv7p4ylq8wur/web-graph.zip?dl=0http://" rel="nofollow">here</a></p> <pre><code>import networkx as nx import pylab as plt webg = nx.read_edgelist('web-graph.txt',create_using=nx.DiGrap...	-1	2016-10-16T11:09:38Z	40,070,648	<p>If you want to count dictionary values you can do it like this:</p> <pre><code>len(list(dict.values())) </code></pre> <p>same method works for keys</p> <pre><code>len(list(dict.keys())) </code></pre> <p>Also keep in mind if you want to get all keys or values in list just use <code>list(dict.values())</code></p>	-1	2016-10-16T13:13:17Z	[ "python", "python-3.x", "networkx" ]
Python Loop In HTML	40,069,601	<p>I have the following row within a table:</p> <pre><code><TR> <TD style="text-align:center;width:50px">{% for z in recentResultHistory %} {{ z.0 }} {% endfor %}</TD> <TD style="text-align:center;width:100px"></TD> <TD style="text-align:center;width:50px">V</TD> ...	0	2016-10-16T11:11:25Z	40,069,804	<p>I should be using list(cursor) rather than cursor.fetchall(). Daniel and dkasak gave me the inspiration to look and I found the following which solved my issue:</p> <p><a href="http://stackoverflow.com/questions/17861152/cursor-fetchall-vs-listcursor-in-python">cursor.fetchall() vs list(cursor) in Python</a></p>	0	2016-10-16T11:38:24Z	[ "python", "html", "for-loop" ]
One Character "lag" in Python 3 Curses Program	40,069,621	<p>I'm attempting to create a roguelike using Python3 and curses. I've got everything displaying the way I want it to, but I've come across a strange bug in the code. There is a 1 key stroke delay in processing the commands. So, assuming traditional roguelike commands, pressing "k" should move you 1 square to the right...	-1	2016-10-16T11:14:22Z	40,070,349	<p>I found the problem and it wasn't in the code I posted. It was inside my render_all() function. I needed to add call to the window's refresh() function after making the changes I was making. I must say, I really don't like curses!</p>	0	2016-10-16T12:39:48Z	[ "python", "python-3.x", "curses" ]
Matplotlib specific representation	40,069,683	<p>I am studying the influence of diverse factors on the distribution of bikes throughout a bike- sharing system called Velib in paris. I have 1222 bike stations with their occupation rate, their latitude and their longitude. I would like to make a map like this : (<a href="http://images.google.fr/imgres?imgurl=http%3...	0	2016-10-16T11:22:50Z	40,070,057	<p>It seems like you need:</p> <pre><code>matplotlib.pyplot.contour(x, y, z) matplotlib.pyplot.contourf(x, y, z) </code></pre> <p>with arguments x - latitude, y - longitude and z - occupation rate. </p>	0	2016-10-16T12:05:47Z	[ "python", "matplotlib" ]
âHelp me!, I would like to find split where the split sums are close to each other?	40,069,689	<p>I have a list is</p> <blockquote> <p>test = [10,20,30,40,50,60,70,80,90,100]</p> </blockquote> <p>âand I would like to find split where the split sums are close to each other by number of splits = 3 that âall possible combinations and select the split where the sum differences are smallest.</p> <p>please ex...	-4	2016-10-16T11:23:27Z	40,085,007	<p>This first script uses a double <code>for</code> loop to split the input list into all possible triplets of lists. For each triplet it calculates the sum of each list in the triplet, then creates a sorted list named <code>diffs</code> of the absolute differences of those sums. It saves a tuple consisting of <code>di...	0	2016-10-17T11:17:11Z	[ "python", "python-2.7", "python-3.x", "recursion", "split" ]
Changing the value of groups with few members in a pandas data frame	40,069,694	<p>I have a data frame which represent different classes with their values. for example:</p> <pre><code>df=pd.DataFrame( {'label':['a','a','b','a','b','b','a','c','c','d','e','c'], 'date':[1,2,3,4,3,7,12,18,11,2,5,3],'value':np.random.randn(12)}) </code></pre> <p>I want to choose the labels with values_counts less t...	2	2016-10-16T11:23:47Z	40,069,736	<p>You can use groupby.transform to get the value counts aligned with the original index, then use it as a boolean index:</p> <pre><code>df.loc[df.groupby('label')['label'].transform('count') <= threshold, 'label'] = 'zero' df Out: date label value 0 1 a -0.587957 1 2 a 0.341551 2 ...	2	2016-10-16T11:30:08Z	[ "python", "pandas" ]
Changing the value of groups with few members in a pandas data frame	40,069,694	<p>I have a data frame which represent different classes with their values. for example:</p> <pre><code>df=pd.DataFrame( {'label':['a','a','b','a','b','b','a','c','c','d','e','c'], 'date':[1,2,3,4,3,7,12,18,11,2,5,3],'value':np.random.randn(12)}) </code></pre> <p>I want to choose the labels with values_counts less t...	2	2016-10-16T11:23:47Z	40,069,790	<p>You could do</p> <pre><code>In [59]: df.loc[df['label'].isin(value_count[value_count.values<=threshold].index), 'label'] = 'zero' In [60]: df Out[60]: date label value 0 1 a -0.132887 1 2 a -1.306601 2 3 zero -1.431952 3 4 a 0.928743 4 3 zero 0.278955 5 7 ...	1	2016-10-16T11:36:25Z	[ "python", "pandas" ]
Python selenium skips over necessary elements	40,069,726	<p>PLEASE DONT DOWNVOTE, THIS QUESTION IS DIFFERENT FROM PREVIOUS ONE, IM USING DIFFERENT LOGIC HERE</p> <p>Im trying to iterate over all user reviews("partial_entry" class) from this page <a href="https://www.tripadvisor.com/Airline_Review-d8729164-Reviews-Cheap-Flights-or560-TAP-Portugal#REVIEWS" rel="nofollow">http...	0	2016-10-16T11:29:00Z	40,072,314	<p>One tip for removing chromedriver path in every script.Put chromedriver.exe in C:\Python27\Scripts than you don't have to put the chromedriver path in every script than just use <code>driver = webdriver.Chrome()</code></p> <p>I am running this code:</p> <pre><code>from selenium import webdriver from selenium.webdr...	2	2016-10-16T16:02:53Z	[ "python", "selenium", "web-scraping" ]
How do I check if a function is called in a function or not, in python? No mock or unittest.	40,069,786	<p>I just want to check whether a particular function is called by other function or not. If yes then I have to store it in a different category and the function that does not call a particular function will be stored in different category. I have 3 .py files with classes and functions in them. I need to check each an...	1	2016-10-16T11:35:40Z	40,069,815	<p>I have no idea what you are asking, but even if it is be <a href="http://stackoverflow.com/questions/2654113/python-how-to-get-the-callers-method-name-in-the-called-method">technically possible</a>, the one and only answer: don't do that.</p> <p>If your design is as such that method A needs to know whether it was c...	0	2016-10-16T11:39:41Z	[ "python" ]
Can a class method change a variable in another class as an unforseen side effect?	40,069,808	<p>I'm having some problem with two classes. This is what I write in my main loop</p> <pre><code>print(player1.getPosSize()) ball.setPos(windowWidth, [player1.getPosSize(), player2.getPosSize()], [player1.getSpeed(), player2.getSpeed()]) print(player1.getPosSize()) </code></pre> <p>Here are the method def...	0	2016-10-16T11:38:43Z	40,069,958	<p>Any <code>mutable</code> object such as <code>list</code> can be changed by anything that has access to it. Ie. if your <code>getPosSize()</code> method is returning the<code>list</code> itself, you can make changes that will affect the same list.</p> <pre><code>class One(object): CLS_LST = [1, 2, 3] def __...	0	2016-10-16T11:55:52Z	[ "python", "class", "variables", "methods" ]
Can a class method change a variable in another class as an unforseen side effect?	40,069,808	<p>I'm having some problem with two classes. This is what I write in my main loop</p> <pre><code>print(player1.getPosSize()) ball.setPos(windowWidth, [player1.getPosSize(), player2.getPosSize()], [player1.getSpeed(), player2.getSpeed()]) print(player1.getPosSize()) </code></pre> <p>Here are the method def...	0	2016-10-16T11:38:43Z	40,070,030	<p>It looks like two variables in your code link to the same list, so changing one of them will change the other.</p> <p>Didn't you do anything like <code>ball.posSize = player1.posSize</code>?</p> <p>If yes, you created a second reference to the same list.</p> <p>To fix this, change <code>ball.posSize = player1.pos...	0	2016-10-16T12:03:04Z	[ "python", "class", "variables", "methods" ]
i got error 10061 in python	40,069,822	<p>im trying to send a message to myself in python but the client code gives me error 10061 the server works properly it worked just fine but than it suddenly started giving me the error. i tried changing the port but it still gives me the same error</p> <p>the server </p> <pre><code>from socket import * from dateti...	-1	2016-10-16T11:40:12Z	40,069,945	<p>10061 error occurs when the target machine refuses a connection. In your case the most likely reason is the "IP" in s.bind and s.connect try putting an actual IP or 127.0.0.1. It should work</p>	0	2016-10-16T11:54:32Z	[ "python", "sockets", "server" ]
i got error 10061 in python	40,069,822	<p>im trying to send a message to myself in python but the client code gives me error 10061 the server works properly it worked just fine but than it suddenly started giving me the error. i tried changing the port but it still gives me the same error</p> <p>the server </p> <pre><code>from socket import * from dateti...	-1	2016-10-16T11:40:12Z	40,070,298	<p>never mind i fixed it the problem was that the input was before the listen and it stalled the program thanks everyone </p>	0	2016-10-16T12:33:27Z	[ "python", "sockets", "server" ]
Plot each unique element of a column in a dataframe with partially overlapping y-Values	40,069,845	<p>I hope I can explain this properly as I am new to pandas. I have the following dataframe in pandas.</p> <pre><code>import numpy as np plant1 = {'Date' : pd.date_range('1/1/2011', periods=10, freq='D'), 'Plant' : pd.Series(["Plant1"]*10), 'Output' : pd.Series(abs(np.random.randn(10)))} plant2 = {'Date' : ...	0	2016-10-16T11:42:44Z	40,069,990	<p>A user in the chat made me aware of the pivot-function.</p> <pre><code>test = pd.pivot_table(sample, index='Date', columns='Plant', values='Output') test = test.fillna(method='pad') test = test.fillna(method='bfill') plt.figure(); test.plot(kind='area') </code></pre> <p><a href...	0	2016-10-16T11:59:20Z	[ "python", "pandas" ]
numba jit: 'DataFlowAnalysis' object has no attribute 'op_STORE_DEREF'	40,069,898	<p>I'm trying to run the following code with numba but get an error:</p> <pre><code>from numba import jit @jit(nopython=True) def create_card_deck(): values = "23456789TJQKA" suites = "CDHS" Deck = [] [Deck.append(x + y) for x in values for y in suites] return Deck create_card_deck() </code></pre...	1	2016-10-16T11:49:34Z	40,070,239	<p>There are two problems here - the more fundamental one is that <code>numba</code> doesn't support strings in <code>nopython</code> mode</p> <pre><code>@jit(nopython=True) def create_card_deck(): values = "23456789TJQKA" suites = "CDHS" return values In [4]: create_card_deck() --------------------------...	2	2016-10-16T12:26:49Z	[ "python", "jit", "numba" ]
Python. Best way to match dictionary value if condition true	40,069,960	<p>I'm trying to build a parser now part of my code is looks like this:</p> <pre><code> azeri_nums = {k:v for k,v in zip(range(1,10),("bir","iki","uc","dord","beÅ","altÄ±","yeddi","sÉkkiz","doqquz"))} russian_nums = {k:v for k,v in zip(range(1,10),("Ð¾Ð´Ð¸Ð½","Ð´Ð²Ð°","ÑÑÐ¸","ÑÐµÑÑÑÐµ","Ð¿ÑÑÑ","Ñ...	0	2016-10-16T11:55:54Z	40,070,043	<p>Change your dict to be</p> <pre><code>azeri_nums = {v.lower():k for k,v in zip(range(1,10),("bir","iki","uc","dord","beÅ","altÄ±","yeddi","sÉkkiz","doqquz"))} russian_nums = {v.lower():k for k,v in zip(range(1,10),("Ð¾Ð´Ð¸Ð½","Ð´Ð²Ð°","ÑÑÐ¸","ÑÐµÑÑÑÐµ","Ð¿ÑÑÑ","ÑÐµÑÑÑ","ÑÐµÐ¼Ñ","Ð²Ð¾ÑÐµÐ¼Ñ","Ð´Ð...	1	2016-10-16T12:04:16Z	[ "python", "dictionary" ]
Url argument with Django	40,070,006	<p>I'm having some problem with my url in Django (1.9)</p> <p>Tried many way to solve it, but still the same type of error</p> <pre><code>Reverse for 'elus' with arguments '()' and keyword arguments '{u'council': u'CFVU'}' not found. 1 pattern(s) tried: ['elus/(?P<council>[A-B]+)$'] </code></pre> <p>The actual...	0	2016-10-16T12:00:32Z	40,070,069	<p>You have <code>[A-B]</code> will only match the letters A and B. </p> <p>If you only want to match uppercase letters you could do:</p> <pre><code>url(r'^elus/(?P<council>[A-Z]+)$ </code></pre> <p>Or, a common approach is to use <code>[\w-]+</code>, which will match upper case A-Z, lowercase a-z, digits 0-9,...	1	2016-10-16T12:07:01Z	[ "python", "django", "url" ]
Add a legend (like a matplotlib legend) to an image	40,070,037	<p><strong>Problem : Add a legend (like a matplotlib legend) to an image</strong></p> <p><strong>Description:</strong></p> <p>I have an image as a numpy array uint8. I want to add a legend to it, exactly as matplotlib does with its plots.</p> <p>My image has , basically, this shape :</p> <pre><code>output_image = n...	2	2016-10-16T12:03:56Z	40,070,971	<p>Your question itself makes it clear that you know how to make an image in a numpy array. Now make your legend using the same techniques in a smaller numpy array.</p> <p>Finally, use the facilities in numpy to replace part of the plot array with the legend array, as discussed in <a href="http://stackoverflow.com/que...	1	2016-10-16T13:45:29Z	[ "python", "numpy", "matplotlib" ]
Tensorflow Logistic Regression	40,070,064	<p>I am trying to implement: <a href="https://www.tensorflow.org/versions/r0.11/tutorials/wide/index.html" rel="nofollow">https://www.tensorflow.org/versions/r0.11/tutorials/wide/index.html</a> on my dataset.</p> <p>I am basically trying to do a binary classification (0 or 1) based on some continuous and categorical f...	0	2016-10-16T12:06:48Z	40,130,207	<p>When you train the model you are passing it the list <code>FEATURE_COLUMNS</code> which I believe you have as a list of strings. When tensor flow loops over this list it is trying to access the key property on a string which fails. you probably want to pass it a list of your tensorflow variables i.e. define a new li...	0	2016-10-19T11:29:51Z	[ "python", "machine-learning", "tensorflow", "logistic-regression" ]
GridSpec on Seaborn Subplots	40,070,093	<p>I currently have 2 subplots using seaborn:</p> <pre><code>import matplotlib.pyplot as plt import seaborn.apionly as sns f, (ax1, ax2) = plt.subplots(2, sharex=True) sns.distplot(df['Difference'].values, ax=ax1) #array, top subplot sns.boxplot(df['Difference'].values, ax=ax2, width=.4) #bottom subplot sns.strippl...	0	2016-10-16T12:09:51Z	40,074,723	<p>As @dnalow mentioned, <code>seaborn</code> has no impact on <code>GridSpec</code>, as you pass a reference to the <code>Axes</code> object to the function. Like so:</p> <pre><code>import matplotlib.pyplot as plt import seaborn.apionly as sns import matplotlib.gridspec as gridspec tips = sns.load_dataset("tips") g...	0	2016-10-16T19:49:11Z	[ "python", "matplotlib", "seaborn", "subplot" ]
Separate sentences on each new line from paragraph using python	40,070,194	<p>I have paragraph as:</p> <p><strong>INPUT :--</strong></p> <p>"However, there is generally a lack of local, regional, and national land use and land cover data of sufficient reliability and temporal and geographic detail for providing accurate estimates of landscape change. The U.S. Geological Survey's EROS Data C...	-1	2016-10-16T12:21:54Z	40,070,504	<p>Using <code>nltk</code> is definately a good approach. The sentances could be enumerated as follows:</p> <pre><code>import nltk text = "However, there is generally a lack of local, regional, and national land use and land cover data of sufficient reliability and temporal and geographic detail for providing accurat...	0	2016-10-16T12:58:24Z	[ "python", "parsing" ]
Serverless Framework v1.0.0 GA - Environment variables within Python Handlers	40,070,216	<p>What is the best practice in regards to env variable with serverless framework. </p> <p>Ive heard some discussion on the python dotenv environment, but Im not too experience with python so looking for guidance on setting this up and using (an example would be good!)</p> <p>For example, I want to have an environme...	0	2016-10-16T12:24:04Z	40,103,231	<p>You can use the <a href="https://www.npmjs.com/package/serverless-plugin-write-env-vars" rel="nofollow">serverless-plugin-write-env-vars</a> plugin to define environment variables in <code>serverless.yml</code>, like this:</p> <pre><code>service: my-service custom: writeEnvVars: DB_ARN: "ec2-xx-xx-xx-xxx....	0	2016-10-18T08:27:57Z	[ "python", "aws-lambda", "serverless-framework" ]
Data transfer between C++ and Python	40,070,249	<p>I would like to share memory between C++ and Python.</p> <p>My problem:</p> <ol> <li>I am working with big data sets (up to 6 GB of RAM) in C++. All calculations are done in c++.</li> <li>Then, I want to "paste" all my results to a Python program. But I can only write my data on disk, and then read that file from ...	2	2016-10-16T12:27:32Z	40,070,781	<p><strong>First path</strong>: I think the more appropriate way for you to go is <a href="https://docs.python.org/3.4/library/ctypes.html" rel="nofollow">ctypes</a>. You can create a shared library, and then load the functions of the shared library in Python, and fill all the data containers you want in Python.</p> <...	2	2016-10-16T13:26:05Z	[ "python", "c++", "data-transfer" ]
Python tornado gen.coroutine blocks request	40,070,259	<p>I am newbie on tornado and python. A couple days ago i started to write a non-blocking rest api, but i couldn't accomplish the mission yet. When i send two request to this endpoint "localhost:8080/async" at the same time, the second request takes response after 20 seconds! That explains i am doing something wrong.</...	0	2016-10-16T12:28:21Z	40,072,378	<p>Never use <code>time.sleep</code> in Tornado code! Use IOLoop.add_timeout to schedule a callback later, or in a coroutine <code>yield gen.sleep(n)</code>.</p> <p><a href="http://www.tornadoweb.org/en/latest/faq.html#why-isn-t-this-example-with-time-sleep-running-in-parallel" rel="nofollow">http://www.tornadoweb.org...	0	2016-10-16T16:08:21Z	[ "python", "tornado", "python-3.5" ]
Python tornado gen.coroutine blocks request	40,070,259	<p>I am newbie on tornado and python. A couple days ago i started to write a non-blocking rest api, but i couldn't accomplish the mission yet. When i send two request to this endpoint "localhost:8080/async" at the same time, the second request takes response after 20 seconds! That explains i am doing something wrong.</...	0	2016-10-16T12:28:21Z	40,079,713	<p>That's strange that returning the <code>ThreadPoolExecutor</code> future, essentially blocks tornado's event loop. If anyone from the tornado team reads this and knows why that is, can they please give an explaination? I had planned to do some stuff with threads in tornado but after dealing with this question, I see...	0	2016-10-17T06:22:53Z	[ "python", "tornado", "python-3.5" ]
Python itertools.product freezes with higher numbers	40,070,289	<p>I have 6 variables with different ranges. I want to create possibilities pool with my code. In this example i gave 10 range for every variable but i have to give them about 200 range. But whenever i'm trying to exceed 20 range (for example 30 range) Python kills itself, and sometimes it freezes computer. Is there an...	0	2016-10-16T12:32:25Z	40,070,342	<p>Use the cartesian_product function from <a href="http://stackoverflow.com/a/11146645/5714445">here</a>Â for an almost 60x speed up from <code>itertools.product()</code></p> <pre><code>def cartesian_product2(arrays): la = len(arrays) arr = np.empty([len(a) for a in arrays] + [la]) for i, a in enumerate...	0	2016-10-16T12:38:47Z	[ "python", "python-3.x", "itertools" ]
Python itertools.product freezes with higher numbers	40,070,289	<p>I have 6 variables with different ranges. I want to create possibilities pool with my code. In this example i gave 10 range for every variable but i have to give them about 200 range. But whenever i'm trying to exceed 20 range (for example 30 range) Python kills itself, and sometimes it freezes computer. Is there an...	0	2016-10-16T12:32:25Z	40,070,432	<p>There are 6 lists of 11 elements each: <code>[400, 401, 402, 403, 404, 405, 406, 407, 408, 409, 410]</code>.</p> <p>A cartesian product of 6 such lists is a list of 11<sup>6</sup> tuples of 6 integers each (the first tuple is: <code>(400, 400, 400, 400, 400, 400)</code>).</p> <p>The size of each tuple is 6*8 bytes...	3	2016-10-16T12:49:33Z	[ "python", "python-3.x", "itertools" ]
Python itertools.product freezes with higher numbers	40,070,289	<p>I have 6 variables with different ranges. I want to create possibilities pool with my code. In this example i gave 10 range for every variable but i have to give them about 200 range. But whenever i'm trying to exceed 20 range (for example 30 range) Python kills itself, and sometimes it freezes computer. Is there an...	0	2016-10-16T12:32:25Z	40,076,955	<p>Maybe instead of doing all of it one-go, you can try doing the product in successive steps. For example,</p> <pre><code>import itertools as itt a = [1, 2, 3] b = [4, 5, 6] c = [7, 8, 9] fl = lambda x: x s1 = filter(fl, itt.product(a, b)) s2 = filter(fl, itt.product(s1, c)) print(list(s2)) </code></pre> <p>But ...	1	2016-10-17T00:26:07Z	[ "python", "python-3.x", "itertools" ]
Python itertools.product freezes with higher numbers	40,070,289	<p>I have 6 variables with different ranges. I want to create possibilities pool with my code. In this example i gave 10 range for every variable but i have to give them about 200 range. But whenever i'm trying to exceed 20 range (for example 30 range) Python kills itself, and sometimes it freezes computer. Is there an...	0	2016-10-16T12:32:25Z	40,085,857	<p>Thanks everyone for your answers. While searching for a better solution, i found an answer on Python documentation. There is an example on documentation for using itertools.product as generator instead of list. Yet, i still can't find any good idea to make it faster. This will help you too if your going to use produ...	0	2016-10-17T12:01:03Z	[ "python", "python-3.x", "itertools" ]
Searching Elements of a List	40,070,357	<p>I am trying to search a array of previous usernames used in a game, for the username currently used by the gamer (allowing all the previous game scores under the username to be displayed). This list has been imported from an external text file.</p> <pre><code>for x in range(0, len(lis)): if username == lis[x]: ...	0	2016-10-16T12:41:36Z	40,070,385	<pre><code>if username in lis: </code></pre> <p>Should do the trick of searching through a list</p> <p>If the code you have written is not working, check if the strings are formatted the same way</p> <pre><code>if username.strip().lower() == lis[x].strip().lower(): </code></pre>	0	2016-10-16T12:45:16Z	[ "python", "list" ]
Searching Elements of a List	40,070,357	<p>I am trying to search a array of previous usernames used in a game, for the username currently used by the gamer (allowing all the previous game scores under the username to be displayed). This list has been imported from an external text file.</p> <pre><code>for x in range(0, len(lis)): if username == lis[x]: ...	0	2016-10-16T12:41:36Z	40,070,415	<p>Try this:</p> <pre><code>for usernameTest in lis: if username == usernameTest.strip(): print "yes" print lis[x] </code></pre>	0	2016-10-16T12:47:41Z	[ "python", "list" ]
Searching Elements of a List	40,070,357	<p>I am trying to search a array of previous usernames used in a game, for the username currently used by the gamer (allowing all the previous game scores under the username to be displayed). This list has been imported from an external text file.</p> <pre><code>for x in range(0, len(lis)): if username == lis[x]: ...	0	2016-10-16T12:41:36Z	40,070,443	<p>I'm not sure if it is what you meant but at least this prints yes:</p> <pre><code>lis = ["Jack","Rose", "Joe", "Franz"] username = "Joe" for x in range(0, len(lis)): if username == lis[x]: print ("yes") </code></pre>	0	2016-10-16T12:51:06Z	[ "python", "list" ]
Get distance to non-empty item in two-dimensional list column	40,070,364	<p>I am trying to make a game of scrabble. I have a board, defined below.</p> <pre><code>self.board = [[" ", "A ", "B ", "C ", "D ", "E ", "F ", "G ", "H ", "I ", "J ", "K ", "L ", "M ", "N ", "O "], ['01', 'TWS', ' ', ' ', 'DLS', ' ', ' ', ' ', 'TWS', ' ', ' ', ' ', 'DLS', ' ', ' ', 'TWS'], ['02', ' ', 'DWS',...	0	2016-10-16T12:42:55Z	40,071,651	<p>You could use <code>next</code>, and extract the column with <code>[row[col_num] for row in board]</code> like this:</p> <pre><code>def distances(row_num, col_num): letters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' if not col_num.isdigit(): col_num = ord(col_num.upper()) - ord('A') + 1 col = [row[col_num] ...	1	2016-10-16T14:52:49Z	[ "python", "python-3.x", "multidimensional-array", "distance" ]
Use parameterized query with mysql.connector in Python 2.7	40,070,368	<p>Im using Python 2.7 with <a href="https://dev.mysql.com/doc/connector-python/en/connector-python-example-cursor-select.html" rel="nofollow"><code>mysql.connector</code></a> running in pyCharm</p> <p>I need to use a parameterized query like shown <a href="https://dev.mysql.com/doc/connector-python/en/connector-pytho...	0	2016-10-16T12:43:36Z	40,070,500	<p>The error you get is from mysql when it tries to execute the query. The query parameters passed to <code>cursor.execute()</code> need to be a tuple, you're passing a single value. To create a tuple with a single element you need to add a comma after the element:</p> <pre><code>cursor.execute("SELECT * FROM automate...	1	2016-10-16T12:57:55Z	[ "python", "mysql", "mysql-connector", "mysql-connector-python" ]
Building a function of a random variable dynamically in python	40,070,390	<p>I have some random variables using <code>scipy.stats</code> as follows:</p> <pre><code>import scipy.stats as st x1 = st.uniform() x2 = st.uniform() </code></pre> <p>Now I would like make another random variable based on previous random variables and make some calculations like <code>var</code> for the new random v...	1	2016-10-16T12:45:38Z	40,074,929	<p>Not directly, I think. However, this approach might be of use to you.</p> <p>Assume to begin with that you know either the pdf or the cdf of the function of the random variables of interest. Then you can use rv_continuous in scipy.stats to calculate the variance and other moments of that function using the recipe o...	0	2016-10-16T20:08:54Z	[ "python", "random", "scipy" ]
cx_Freeze: no base named Console	40,070,426	<p>I am trying to compile a simple "Hello, world!" python script using cx_freeze (linux). I installed cx-freeze via the SourceForge tar file, because I had to apply <a href="https://bitbucket.org/anthony_tuininga/cx_freeze/issues/32/cant-compile-cx_freeze-in-ubuntu-1304" rel="nofollow">this</a> patch.</p> <p>However, ...	0	2016-10-16T12:48:49Z	40,070,675	<p>I just solved the problem by changing</p> <pre><code>ext = ".exe" if sys.platform == "win32" else "" </code></pre> <p>to</p> <pre><code>ext = ".exe" if sys.platform == "win32" else ".py" </code></pre> <p>in file freezer.py</p>	0	2016-10-16T13:16:33Z	[ "python", "linux", "build", "cx-freeze" ]
Algorithm for finding the possible palindromic strings in a list containing a list of possible subsequences	40,070,474	<p>I have "n" number of strings as input, which i separate into possible subsequences into a list like below</p> <p>If the Input is : aa, b, aa</p> <p>I create a list like the below(<strong>each list having the subsequences of the string</strong>):</p> <pre><code>aList = [['a', 'a', 'aa'], ['b'], ['a', 'a', 'aa']] <...	1	2016-10-16T12:55:03Z	40,071,717	<h1>Second version</h1> <p>This version uses a set called <code>seen</code>, to avoid testing combinations more than once.</p> <p>Note that your function <code>isPalindrome()</code> can simplified to single expression, so I removed it and just did the test in-line to avoid the overhead of an unnecessary function call...	0	2016-10-16T14:59:54Z	[ "python", "algorithm" ]
Algorithm for finding the possible palindromic strings in a list containing a list of possible subsequences	40,070,474	<p>I have "n" number of strings as input, which i separate into possible subsequences into a list like below</p> <p>If the Input is : aa, b, aa</p> <p>I create a list like the below(<strong>each list having the subsequences of the string</strong>):</p> <pre><code>aList = [['a', 'a', 'aa'], ['b'], ['a', 'a', 'aa']] <...	1	2016-10-16T12:55:03Z	40,071,991	<p>Current approach has disadvantage and that most of generated solutions are finally thrown away when checked that solution is/isn't palindrome.</p> <p>One Idea is that once you pick solution from one side, you can immediate check if there is corresponding solution in last group.</p> <p>For example lets say that you...	0	2016-10-16T15:28:14Z	[ "python", "algorithm" ]
Algorithm for finding the possible palindromic strings in a list containing a list of possible subsequences	40,070,474	<p>I have "n" number of strings as input, which i separate into possible subsequences into a list like below</p> <p>If the Input is : aa, b, aa</p> <p>I create a list like the below(<strong>each list having the subsequences of the string</strong>):</p> <pre><code>aList = [['a', 'a', 'aa'], ['b'], ['a', 'a', 'aa']] <...	1	2016-10-16T12:55:03Z	40,074,371	<p>For larger input you could probably get some time gain by grabbing words from the first array, and compare them with the words of the last array to check that these pairs still allow for a palindrome to be formed, or that such a combination can never lead to one by inserting arrays from the remaining words in betwee...	0	2016-10-16T19:13:08Z	[ "python", "algorithm" ]
Can't change tkinter label text constantly in loop	40,070,475	<p>I'm trying to make simple Quiz program. I want labels to change their text for every question in range of 10 questions. So, when you are on 1st question, one label should show 'Question 1'. But it immediately shows 'Question 10', and I'm unable to play quiz.</p> <p>In dictionary, there's only one question, but it s...	1	2016-10-16T12:55:10Z	40,071,202	<p>You need to wait for the user to enter their answer into the Entry widget. The code you posted doesn't do that. You have to organize your logic a little differently in GUI programss compared to command-line programs because you need to wait for events generated by user actions and then respond to them.</p> <p>The ...	1	2016-10-16T14:07:18Z	[ "python", "loops", "for-loop", "tkinter", "range" ]
Python using while loop with a list name	40,070,584	<p>I am a beginner to python so this might be easy but I am not sure of what the following code means.</p> <pre><code>q=[start] while q: </code></pre> <p>Does this mean when there is at least one element in the list q execute it and q becomes false when it is empty? Edit:I cannot execute it at the moment and I ne...	1	2016-10-16T13:07:19Z	40,070,694	<p>The line <code>q = [start]</code> means <em>create a variable called <code>q</code>, and assign the value <code>[start]</code> to it</em>. In this case, it will create a list with one element: the value of the variable <code>start</code>. It's the exact same syntax as <code>q = [1, 2]</code>, but it uses a variable ...	2	2016-10-16T13:18:20Z	[ "python", "list", "while-loop" ]
How to unpack a tuple for looping without being dimension specific	40,070,615	<p>I'd like to do something like this:</p> <pre><code> if dim==2: a,b=grid_shape for i in range(a): for j in range(b): A[i,j] = ...things... </code></pre> <p>where <code>dim</code> is simply the number of elements in my tuple <code>grid_shape</code>. <code>A</code> is a ...	0	2016-10-16T13:11:17Z	40,070,778	<p>Using itertools, you can do it like this:</p> <pre><code>for index in itertools.product(*(range(x) for x in grid_shape)): A[index] = ...things... </code></pre> <p>This relies on a couple of tricks. First, <code>itertools.product()</code> is a function which generates tuples from iterables.</p> <pre><code>for...	0	2016-10-16T13:25:53Z	[ "python", "loops", "numpy", "multidimensional-array", "tuples" ]
How to unpack a tuple for looping without being dimension specific	40,070,615	<p>I'd like to do something like this:</p> <pre><code> if dim==2: a,b=grid_shape for i in range(a): for j in range(b): A[i,j] = ...things... </code></pre> <p>where <code>dim</code> is simply the number of elements in my tuple <code>grid_shape</code>. <code>A</code> is a ...	0	2016-10-16T13:11:17Z	40,070,813	<p>You can catch the rest of the tuple by putting a star in front of the last variable and make a an array by putting parentheses around it.</p> <pre><code>>>> tupl = ((1, 2), 3, 4, 5, 6) >>> a, *b = tupl >>> a (1, 2) >>> b [3, 4, 5, 6] >>> </code></pre> <p>And then you c...	0	2016-10-16T13:29:17Z	[ "python", "loops", "numpy", "multidimensional-array", "tuples" ]
Iterative RFE scores sklearn	40,070,681	<p>I'm using RFE with ExtraTreeRegressor as estimator in order to make SupervisedFeatureSelection in a regression problem. </p> <p>I get the ranking and the support from the model with the common code below:</p> <pre><code>rfe_vola = RFE(estimator=ExtraTreesRegressor(), n_features_to_select=1, step=1) rfe_vola.fit(X_...	0	2016-10-16T13:16:54Z	40,093,005	<p>That is was I was looking for:</p> <pre><code>from sklearn.metrics import r2_score rfe_vola = RFE(estimator=ExtraTreesRegressor(),n_features_to_select=None, step=1, verbose=2) r2_scorer = lambda est, features: r2_score(y_true=y_vol,y_pred=est.predict(X_allfeatures[:, features])) rfe_vola._fit(X_allfeatures, y_...	0	2016-10-17T18:12:10Z	[ "python", "scikit-learn", "iteration", "rfe" ]
BeautifulSoup html table scrape - will only return last row	40,070,746	<p>I am attempting a simple scrape of an HTML table using BeautifulSoup with the following:</p> <pre><code>import urllib import urllib.request from bs4 import BeautifulSoup def make_soup(url): page = urllib.request.urlopen(url) sdata = BeautifulSoup(page, 'html.parser') return sdata url = 'http://www.sat...	0	2016-10-16T13:23:19Z	40,070,982	<p>Your problem is here:</p> <pre><code>bbdata = [ele.text.strip() for ele in bbdata_] </code></pre> <p>You want to append to the list or extend it:</p> <pre><code>bbdata.append([ele.text.strip() for ele in bbdata_]) </code></pre> <p>You are overwriting bbdata each time through the loop which is why it ends up only...	2	2016-10-16T13:46:28Z	[ "python", "beautifulsoup", "html-table" ]
Why is this code dependant on my local machine timezone?	40,070,757	<p>Why does this code:</p> <pre><code>def parse_date(datetime_string, tz_code): tz = timezone(tz_code) datetime_obj = parser.parse(datetime_string) datetime_obj_localized = datetime_obj.replace(tzinfo=tz) return time.mktime(datetime_obj_localized.timetuple()) def test_parse_date(self): self.assert...	1	2016-10-16T13:24:15Z	40,071,275	<p><code>dateutil.parser</code> will attach a time zone if and only if it finds one, which <em>could</em> depend on your local machine time zone settings, because if it detects an abbreviated time zone like "EST" that is in the list of abbreviations for your local time zone, it will assume that that's the one you mean....	2	2016-10-16T14:13:33Z	[ "python", "timezone", "python-dateutil" ]
Best Way to launch an asynchronous function in django?	40,070,758	<p>I am using <code>tweepy</code> library to collect tweets from <code>twitter streaming API</code> and store them in an <code>Elasticsearch</code> server. Overall I am writing a simple <code>Django application</code> to display the tweets in real time, over a map. However for that I need the ElasticSearch database to ...	-1	2016-10-16T13:24:24Z	40,070,897	<p>Use <a href="http://www.celeryproject.org/" rel="nofollow">celery</a> along with <a href="https://pypi.python.org/pypi/celery-haystack" rel="nofollow">celery-haystack</a> (hopefully you are already using <a href="http://haystacksearch.org/" rel="nofollow">django-haystack</a> to interact with Elasticsearch). Its not ...	0	2016-10-16T13:37:13Z	[ "python", "django", "twitter", "django-views", "tweepy" ]
Best Way to launch an asynchronous function in django?	40,070,758	<p>I am using <code>tweepy</code> library to collect tweets from <code>twitter streaming API</code> and store them in an <code>Elasticsearch</code> server. Overall I am writing a simple <code>Django application</code> to display the tweets in real time, over a map. However for that I need the ElasticSearch database to ...	-1	2016-10-16T13:24:24Z	40,084,068	<p>I use supervisor + <a href="https://docs.djangoproject.com/es/1.10/howto/custom-management-commands/" rel="nofollow">custom django command</a>. Inside the command you decide when to run that asynchronous function.</p>	0	2016-10-17T10:31:59Z	[ "python", "django", "twitter", "django-views", "tweepy" ]
How to round to the nearest lower float in Python?	40,070,868	<p>I have a list of floats which I want to round up to 2 numbers; I used below line for this purpose:</p> <pre><code>item = ['41618.45110', '1.00', '0.00', '0.00', '0.00', '0.00', '0.00', '0.00', '0.00', '0.00', '0.00', '0.00', '41619.001202', '3468.678822'] print ["{0:.2f}".format(round(float(x), 2)) if re.match("^\d...	1	2016-10-16T13:34:52Z	40,070,934	<p>You can use a cast to do that :</p> <pre><code>a = '3468.678822' def round_2(n): return ((int)(n*100)/100) print(round_2(float(a))) >>> 3468.67 </code></pre>	1	2016-10-16T13:41:53Z	[ "python", "formatting", "precision" ]
How to round to the nearest lower float in Python?	40,070,868	<p>I have a list of floats which I want to round up to 2 numbers; I used below line for this purpose:</p> <pre><code>item = ['41618.45110', '1.00', '0.00', '0.00', '0.00', '0.00', '0.00', '0.00', '0.00', '0.00', '0.00', '0.00', '41619.001202', '3468.678822'] print ["{0:.2f}".format(round(float(x), 2)) if re.match("^\d...	1	2016-10-16T13:34:52Z	40,071,509	<p>I just made a couple functions for this kind of precision rounding. Added some documentation for how it works, in case you'd be curious as to how they work.</p> <pre><code>import math def precCeil(num, place = 0): """ Rounds a number up to a given place. num - number to round up place - place to r...	0	2016-10-16T14:39:03Z	[ "python", "formatting", "precision" ]
Python pandas group by two columns	40,070,909	<p>I have a pandas dataframe:</p> <pre><code> code type index 312 11 21 312 11 41 312 11 21 313 23 22 313 11 21 ... ... </code></pre> <p>So I need to group it by count of pairs 'code' and 'type' columns for each index item:</p> <pre><code> 11_21 11_...	0	2016-10-16T13:38:16Z	40,071,119	<p>Here's one way using <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.crosstab.html" rel="nofollow"><code>pd.crosstab</code></a> and then rename column names, using levels information.</p> <pre><code>In [136]: dff = pd.crosstab(df['index'], [df['code'], df['type']]) In [137]: dff Out[137]: cod...	1	2016-10-16T13:58:07Z	[ "python", "pandas", "dataframe", "group-by" ]
I need to find The smallest positive factor (apart from 1) of the integer ânâ, where n â¥ 2	40,070,961	<p>i can only use for loops and range.. no while loop.</p> <pre><code>def SmalletFactor(n): # find the smallest positive factor (apart from 1) of the # integer ânâ, where n â¥ 2 result = 0 m = n for i in range(2, n -1): if n >=2 and (n % i == 0): result = n // i ...	-2	2016-10-16T13:44:32Z	40,071,038	<p>Your code is more complicated than it needs to be. Consider the following:</p> <pre><code>def SmallestFactor(n): for i in range(2, n + 1): # n + 1 ensures that n itself # is returned if n is prime if n % i == 0: return i return None # this should never happ...	1	2016-10-16T13:52:38Z	[ "python", "factors" ]
Python 2.7: Print a dictionary without brackets and quotation marks	40,071,006	<pre><code>myDict = {"Harambe" : "Gorilla", "Restaurant" : "Place", "Codeacademy" : "Place to learn"} </code></pre> <p>So, I want to print out a dictionary. But I want to do it like it looks like an actual list of things. I can't just do <code>print myDict</code>, as it will leave all the ugly stuff in. I want the out...	1	2016-10-16T13:49:44Z	40,071,052	<p>You could try something like this.</p> <pre><code>for (i, j) in myDict.items(): print "{0} : {1}".format(i, j), end = " " </code></pre> <p>Note that since dictionaries don't care about order, the output will most likely be more like <code>Restaurant : Place Harambe : Gorilla Codeacademy : Place to learn</code...	0	2016-10-16T13:53:30Z	[ "python", "python-2.7", "dictionary", "printing" ]
Python 2.7: Print a dictionary without brackets and quotation marks	40,071,006	<pre><code>myDict = {"Harambe" : "Gorilla", "Restaurant" : "Place", "Codeacademy" : "Place to learn"} </code></pre> <p>So, I want to print out a dictionary. But I want to do it like it looks like an actual list of things. I can't just do <code>print myDict</code>, as it will leave all the ugly stuff in. I want the out...	1	2016-10-16T13:49:44Z	40,071,073	<p>My solution:</p> <pre><code>print ', '.join('%s : %s' % (k,myDict[k]) for k in myDict.keys()) </code></pre>	1	2016-10-16T13:54:48Z	[ "python", "python-2.7", "dictionary", "printing" ]
Python 2.7: Print a dictionary without brackets and quotation marks	40,071,006	<pre><code>myDict = {"Harambe" : "Gorilla", "Restaurant" : "Place", "Codeacademy" : "Place to learn"} </code></pre> <p>So, I want to print out a dictionary. But I want to do it like it looks like an actual list of things. I can't just do <code>print myDict</code>, as it will leave all the ugly stuff in. I want the out...	1	2016-10-16T13:49:44Z	40,071,100	<p>Using the <code>items</code> dictionary method:</p> <pre><code>print('\n'.join("{}: {}".format(k, v) for k, v in myDict.items())) </code></pre> <p>Output: </p> <pre><code>Restaurant: Place Codeacademy: Place to learn Harambe: Gorilla </code></pre> <p>Expanded: </p> <pre><code>for key, value in myDict.items(): ...	1	2016-10-16T13:56:42Z	[ "python", "python-2.7", "dictionary", "printing" ]
how to split a string with whitespace but ignore specific whitespace (that includes comma) in python	40,071,026	<p>I want split a string with whitespace but ignore specific whitespace (that includes comma).</p> <p>Example: </p> <pre><code>str = "abc de45+ Pas hfa, underak (333)" </code></pre> <p><strong>Required split</strong>:</p> <pre><code>Item 1: abc Item 2: de45+ Item 3: Pas hfa, underak Item 4: (333) </code></pre>	-2	2016-10-16T13:51:33Z	40,071,048	<p>If you want to split only at a space, then simply use <code>split()</code></p> <pre><code>a = "abc de45+ Pas hfa, underak (333)" split_str = a.split(' ') #Splits only at space </code></pre> <p>If you want to split at spaces but not period, as suggested by @Beloo, use regex</p> <pre><code>import re a = "abc de...	0	2016-10-16T13:53:16Z	[ "python", "regex" ]
how to split a string with whitespace but ignore specific whitespace (that includes comma) in python	40,071,026	<p>I want split a string with whitespace but ignore specific whitespace (that includes comma).</p> <p>Example: </p> <pre><code>str = "abc de45+ Pas hfa, underak (333)" </code></pre> <p><strong>Required split</strong>:</p> <pre><code>Item 1: abc Item 2: de45+ Item 3: Pas hfa, underak Item 4: (333) </code></pre>	-2	2016-10-16T13:51:33Z	40,071,265	<p>You should split by <code>(?<!,)\s</code> Check here : <a href="https://regex101.com/r/9VXO49/1" rel="nofollow">https://regex101.com/r/9VXO49/1</a></p>	1	2016-10-16T14:12:49Z	[ "python", "regex" ]
how to send html object from python to web page Tornado	40,071,071	<p>Inside my python code I have a html code for table </p> <pre><code>import os.path import tornado.httpserver import tornado.ioloop import tornado.options import tornado.web from tornado.options import define, options define("port", default=8000, help="run on the given port", type=int) class IndexHandler(tornado.web....	0	2016-10-16T13:54:32Z	40,071,612	<p>Tornado template output is escaped by default. To include raw html, use the <code>raw</code> template directive (and be careful of XSS!): <code>{% raw tableinfo %}</code></p>	0	2016-10-16T14:49:13Z	[ "python", "html", "tornado" ]
How to split a column data into other columns which is stored in a dataframe?	40,071,074	<p>The df is the dataframe which contain the following information.</p> <pre><code> In [61]: df.head() Out[61]: id movie_id info 0 1 1 Italy:1 January 1994 1 2 2 USA:22 January 2006 2 3 3 USA:12 February 2006 3 4 4 USA:Februa...	0	2016-10-16T13:54:50Z	40,071,213	<p>You can use regex <code>:\|\s+</code> to split the column on either semicolon or white spaces and specify the <code>expand</code> parameter to be true so that the result will expand to columns:</p> <pre><code>df[["country","Date","Month","Year"]] = df['info'].str.split(':\|\s+', expand = True) </code></pre> <p><a hr...	0	2016-10-16T14:08:03Z	[ "python", "pandas" ]
How to split a column data into other columns which is stored in a dataframe?	40,071,074	<p>The df is the dataframe which contain the following information.</p> <pre><code> In [61]: df.head() Out[61]: id movie_id info 0 1 1 Italy:1 January 1994 1 2 2 USA:22 January 2006 2 3 3 USA:12 February 2006 3 4 4 USA:Februa...	0	2016-10-16T13:54:50Z	40,071,226	<p>Using <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.Series.str.split.html" rel="nofollow"><code>split</code></a> string method.</p> <pre><code>In [163]: df[['country', 'date', 'month', 'year']] = df['info'].str.split('\W+', expand=True) In [164]: df Out[164]: id movie_id ...	0	2016-10-16T14:09:22Z	[ "python", "pandas" ]
Filter a large number of IDs from a dataframe Spark	40,071,095	<p>I have a large dataframe with a format similar to</p> <pre><code>+-----+------+------+ \|ID \|Cat \|date \| +-----+------+------+ \|12 \| A \|201602\| \|14 \| B \|201601\| \|19 \| A \|201608\| \|12 \| F \|201605\| \|11 \| G \|201603\| +-----+------+------+ </code></pre> <p>and I need to filter rows based on ...	1	2016-10-16T13:56:35Z	40,071,408	<p>If you're committed to using Spark SQL and <code>isin</code> doesn't scale anymore then inner equi-join should be a decent fit. </p> <p>First convert id list to as single column <code>DataFrame</code>. If this is a local collection</p> <pre><code>ids_df = sc.parallelize(id_list).map(lambda x: (x, )).toDF(["id"]) <...	3	2016-10-16T14:28:19Z	[ "python", "apache-spark", "pyspark" ]
How to plot multiple lines in one figure in Pandas Python based on data from multiple columns?	40,071,096	<p>I have a dataframe with 3 columns, like this:</p> <pre><code>df['year'] = ['2005, 2005, 2005, 2015, 2015, 2015, 2030, 2030, 2030'] df['name'] = ['A', 'B', 'C', 'A', 'B', 'C', 'A', 'B', 'C'] df['weight'] = [80, 65, 88, 65, 60, 70, 60, 55, 65] </code></pre> <p>how can I plot a line for A, B and C, where it shows ho...	2	2016-10-16T13:56:36Z	40,071,258	<p>Does this produce what you're looking for?</p> <pre><code>import matplotlib.pyplot as plt fig,ax = plt.subplots() for name in ['A','B','C']: ax.plot(df[df.name==name].year,df[df.name==name].weight,label=name) ax.set_xlabel("year") ax.set_ylabel("weight") ax.legend(loc='best') </code></pre> <p><a href="https:...	0	2016-10-16T14:12:16Z	[ "python", "pandas", "matplotlib", "plot" ]
How to call a variable inside main function from another program in python?	40,071,150	<p>I have two python files first.py and second.py</p> <p>first.py looks like</p> <pre><code>def main(): #some computation first_variable=computation_result </code></pre> <p>second.py looks like</p> <pre><code>import first def main(): b=getattr(first, first_variable) #computation </code></pre> <p>but I am g...	0	2016-10-16T14:01:08Z	40,071,244	<p>You should use function calls and return values instead of this. </p> <p>Return the computation_result from the function in the first file, and then store the result in the b variable in the second file.</p> <p>first.py</p> <pre><code>def main(): # computation return computation_result </code></pre> <p>s...	3	2016-10-16T14:11:16Z	[ "python" ]
How to call a variable inside main function from another program in python?	40,071,150	<p>I have two python files first.py and second.py</p> <p>first.py looks like</p> <pre><code>def main(): #some computation first_variable=computation_result </code></pre> <p>second.py looks like</p> <pre><code>import first def main(): b=getattr(first, first_variable) #computation </code></pre> <p>but I am g...	0	2016-10-16T14:01:08Z	40,071,316	<p>You will want to read <a href="https://docs.python.org/3/tutorial/classes.html#a-word-about-names-and-objects" rel="nofollow">9.1 and 9.2</a> in the Tutorial and <a href="https://docs.python.org/3/reference/executionmodel.html#naming-and-binding" rel="nofollow">Naming and Binding</a> in the Language Reference.</p> ...	1	2016-10-16T14:18:23Z	[ "python" ]
Django - trouble with separating objects by user and date	40,071,153	<p>So I have these models: </p> <pre><code>excercises_choices = (('Bench Press', 'Bench press'),('Overhead Press', 'Overhead Press'), ('Squat', 'Squat'), ('Deadlift', 'Deadlift')) unit_choices = (('kg','kg'), ('lbs', 'lbs')) class Lifts(models.Model): user = models.ForeignKey('auth.User', null=Tru...	1	2016-10-16T14:01:26Z	40,073,718	<p>Have a look at the <a href="https://docs.djangoproject.com/en/dev/ref/templates/builtins/#regroup" rel="nofollow">regroup</a> template tag, it does exactly what you need.</p> <p>You can do something like this in your view:</p> <pre><code>@login_required def entries(request): lifts_by_user = (Lifts.objects.filt...	0	2016-10-16T18:14:58Z	[ "python", "django", "web-applications", "django-models", "django-templates" ]
Self Restarting a Python Script	40,071,165	<p>I have created a watchdog timer for my script (Python 3), which allows me to halt execution if anything goes wrong (not shown in code below). However, I would like to have the ability to restart the script automatically using only Python (no external scripts). The code needs to be cross platform compatible.</p> <p>...	0	2016-10-16T14:03:09Z	40,072,303	<p>Sounds like you are using threading in your original script, which explains why your can't break your original script when simply pressing <kbd>Ctrl</kbd>+<kbd>C</kbd>. In that case, you might want to add a KeyboardInterrupt exception to your script, like this:</p> <pre><code>from time import sleep def interrupt_th...	0	2016-10-16T16:02:05Z	[ "python", "restart", "unattended-processing" ]
Python Sockets SSL: certificate verify failed	40,071,168	<p>I am attempting to use python sockets to make an Extensible Provisioning Protocol (EPP) request to a domain registrar, which only accepts requests over ssl.</p> <p>Certificate file: www.myDomain.se.crt Key File: mydomain.pem</p> <pre><code>openssl s_client -connect epptestv3.iis.se:700 -cert www.myDomain.se.crt -k...	0	2016-10-16T14:03:25Z	40,071,235	<p>From your code:</p> <pre><code> cert_reqs=ssl.CERT_REQUIRED, ca_certs=None </code></pre> <p>From the <a href="https://docs.python.org/2/library/ssl.html#ssl.wrap_socket" rel="nofollow">documentation of wrap_socket</a>:</p> <blockquote> <p>If the value of this parameter is ...	2	2016-10-16T14:10:23Z	[ "python", "sockets", "ssl", "registrar", "epp" ]
Making continuous clicks on a pagination 'view-more' button in selenium (python) to load JS populated data	40,071,189	<p>I am trying to crawl the contents of a website by dynamically clicking a 'load-more' button. I saw some other <a href="http://stackoverflow.com/questions/30490549/how-to-click-on-load-button-dynamically-using-selenium-python/40071131#40071131">similar questions</a> but they seem to be getting other types of errors o...	0	2016-10-16T14:06:13Z	40,074,236	<p>When websites like that dynamically load in content that way, it tends to wreak havoc on the page DOM, constantly invalidating element as new ones are being loaded in. I have found the best approach is to organize your code in way that puts the selenium calls into their own functions, which you then decorate with a ...	1	2016-10-16T18:59:25Z	[ "python", "selenium", "pagination", "web-crawler", "selenium-chromedriver" ]
What are routine and subroutine in program?	40,071,214	<p>I am learning stack and hearing this word called "Subroutine" too much. I am confused: what are exactly "routine" and "subroutine" ? </p> <p>Let's suppose I have a program :</p> <pre><code>def tav(x): if x==0: return 19 else: u=1 tav(x-1) u+=1 tav(4) </code></pre> <p>So what ar...	2	2016-10-16T14:08:16Z	40,071,241	<p>Routines and subroutines are the same. In older languages such as Fortran you had to differenciate between subroutines and functions. The latter returned something the former changed some state.</p>	3	2016-10-16T14:10:47Z	[ "python", "stack", "subroutine", "routines" ]
python: dictionaries overwriting when using pythonic way	40,071,262	<p>If I create a dictionary in a pythonic way, it gets overwritten</p> <pre><code>ans = ['car','bus'] exp = ['a','b'] for ex in exp: b ={x: {ex: {'1:N': [],'2:N': []}} for x in ans} </code></pre> <p>How do I avoid overwriting of an 'a' key?</p>	-3	2016-10-16T14:12:33Z	40,071,769	<p>It looks like you are beginner in Python so I would suggest break your program into smaller pieces to debug it. In your case dictionaries is getting overwritten because <code>=</code> operator always do reassignment that is create new copy and does not modify the existing variable even for mutable data types</p> <...	1	2016-10-16T15:05:21Z	[ "python" ]
Filtering a column in a Spark Dataframe to find percentage of each element	40,071,263	<p>I am trying to filter a column in a Spark Dataframe with pyspark, I want to know which records represents 10% or less than the total column, </p> <p>For example I have the following column entitled "Animal" in my DataFrame :</p> <p><strong>Animal</strong></p> <ul> <li>Cat</li> <li>Cat</li> <li>Dog</li> <li>Dog</l...	0	2016-10-16T14:12:39Z	40,075,506	<p>You first have to count the total and in a second step use it to filter.</p> <p>In condensed code (pyspark, spark 2.0):</p> <pre><code>import pyspark.sql.functions as F df=sqlContext.createDataFrame([['Cat'],['Cat'],['Dog'],['Dog'], ['Cat'],['Cat'],['Dog'],['Dog'],['Cat'],['Rat']],['Animal']) total=df.count() ...	0	2016-10-16T21:08:33Z	[ "python", "filtering", "pyspark", "spark-dataframe", "pyspark-sql" ]
Adding a new Unique Field in an existing database table with existing values- Django1.7/MySql	40,071,295	<p>I have an existing database table. I want to add a new (Char)field to it. This field will have unique values.</p> <p>When I try to do so:</p> <pre><code>id = models.CharField(max_length=100, Unique=True) </code></pre> <p>I get integrity error.</p> <p>Some of the other things I have tried :</p> <pre><code>id = m...	1	2016-10-16T14:16:09Z	40,071,496	<p>I will show the following with the new column being an INT not a CHAR. Same difference. </p> <pre><code>create table t1 ( id int auto_increment primary key, col1 varchar(100) not null ); insert t1(col1) values ('fish'),('apple'),('frog'); alter table t1 add column col2 int; -- OK (all of col2 is now NULL) AL...	1	2016-10-16T14:38:01Z	[ "python", "mysql", "django" ]
How to change 1 bit from a string python?	40,071,311	<p>I generate a 64 bits random string using <code>os.urandom(8)</code>. Next, I want to randomly change the value of one bit of the string getting the bit to change first <code>x = random.getrandbits(6)</code> and doing the XOR operation for that bit like this <code>rand_string ^= 1 << x</code> but this last oper...	1	2016-10-16T14:18:18Z	40,071,356	<p>I do not see the point in getting random bits and than lshifting. A randInt should do just right. Also if you want to change a single bit, try to xor a character instead of the string. If that does not work <code>...=chr(ord(char)^x)</code></p>	0	2016-10-16T14:22:38Z	[ "python", "python-2.7", "random", "bit-manipulation" ]
How to change 1 bit from a string python?	40,071,311	<p>I generate a 64 bits random string using <code>os.urandom(8)</code>. Next, I want to randomly change the value of one bit of the string getting the bit to change first <code>x = random.getrandbits(6)</code> and doing the XOR operation for that bit like this <code>rand_string ^= 1 << x</code> but this last oper...	1	2016-10-16T14:18:18Z	40,071,709	<p>I assume there's a typo in your question. As Jonas Wielicki says, <code>os.random</code> doesn't exist; presumably you meant <code>os.urandom</code>. Yes, it's a Good Idea to use the system's random source for crypto work, but using <code>os.urandom</code> directly isn't so convenient. Fortunately, the <code>random<...	3	2016-10-16T14:59:04Z	[ "python", "python-2.7", "random", "bit-manipulation" ]
how to use linecache.clearcache to clear the cache of a certain file?	40,071,332	<p>If I use linecache to read several files, and now the memory is to busy such that I want to clear a certain file cache rather than use 'linecache.clearcache()' to clear all the cache, what should I do?</p>	0	2016-10-16T14:20:19Z	40,100,422	<p>I had the same consideration as you.</p> <p>So I wrote the test codes by myself. You can check it out.</p> <p><a href="https://ideone.com/xHxTEl" rel="nofollow">https://ideone.com/xHxTEl</a></p> <p>Basically using <code>linecache.clearcache()</code> which is out of for-loop could be much faster but it would consu...	0	2016-10-18T05:45:01Z	[ "python", "caching" ]
scatter plot and line in python	40,071,398	<p>I have a question about how to place scatter plot and line into one graph correctly.</p> <p>Here is the code:</p> <pre><code>import numpy as np import matplotlib.pyplot as plt t= np.linspace(60, 180,100) ax= plt.subplot() ax.plot(data.Weight, data.Height , color = 'red') ax.plot(t, 60+ 0.05*t, label=r"$Height = 6...	0	2016-10-16T14:26:58Z	40,071,443	<p>Assuming you want the variable <code>data</code> to be displayed in the scatter plot,</p> <pre><code>ax.scatter(data.Weight, data.Height , color = 'red') </code></pre>	0	2016-10-16T14:32:31Z	[ "python", "numpy", "matplotlib", "plot" ]
scatter plot and line in python	40,071,398	<p>I have a question about how to place scatter plot and line into one graph correctly.</p> <p>Here is the code:</p> <pre><code>import numpy as np import matplotlib.pyplot as plt t= np.linspace(60, 180,100) ax= plt.subplot() ax.plot(data.Weight, data.Height , color = 'red') ax.plot(t, 60+ 0.05*t, label=r"$Height = 6...	0	2016-10-16T14:26:58Z	40,071,694	<p>To scatter <code>data.Weight</code> against <code>data.Height</code>:</p> <pre><code>ax.plot(data.Weight, data.Height , 'o', markerfacecolor = 'red') </code></pre>	0	2016-10-16T14:57:59Z	[ "python", "numpy", "matplotlib", "plot" ]
Writing large amounts of numbers to a HDF5 file in Python	40,071,425	<p>I currently have a data-set with a million rows and each around 10000 columns (variable length).</p> <p>Now I want to write this data to a HDF5 file so I can use it later on. I got this to work, but it's <strong>incredibly slow</strong>. Even a 1000 values take up to a few minutes just to get stored in the HDF5 fil...	0	2016-10-16T14:30:15Z	40,074,505	<p>Following <a href="http://docs.h5py.org/en/latest/special.html" rel="nofollow">http://docs.h5py.org/en/latest/special.html</a></p> <p>and using an open h5 file <code>f</code>, I tried:</p> <pre><code>dt = h5py.special_dtype(vlen=np.dtype('int32')) vset=f.create_dataset('vset', (100,), dtype=dt) </code></pre> <p>S...	1	2016-10-16T19:27:07Z	[ "python", "numpy", "hdf5", "numpy-broadcasting" ]
Prevent Tweepy from falling behind	40,071,459	<p><code>streamer.filter(locations=[-180, -90, 180, 90], languages=['en'], async=True)</code></p> <p>I am trying to extract the tweets which have been geotagged from the twitter streaming API using the above call. However, I guess tweepy is not able to handle the requests and quickly falls behind the twitter rate. Is ...	0	2016-10-16T14:34:08Z	40,072,173	<p>There is no workaround to rate limits other than polling for the rate limit status and waiting for the rate limit to be over. you can also use the flag 'wait_on_rate_limit=True'. This way tweepy will poll for rate limit by itself and sleep until the rate limit period is over.</p> <p>You can also use the flag 'monit...	0	2016-10-16T15:48:15Z	[ "python", "twitter", "tweepy" ]
Swapping characters in string inputted from user in python	40,071,461	<p>I'm a beginner in Python. I have already taken an input from the user for string and turned it into a list so I can manipulate the individual characters. I know how to switch say, the first and last letter, etc. but I am confused on what code to use because I don't know how many characters the user will input. Someo...	-2	2016-10-16T14:34:23Z	40,071,495	<p>In python, reversing the order of a list is as simple as <code>list[::-1]</code></p> <p>So say</p> <pre><code>a='my_string' a=a[::-1] print(a) </code></pre> <p>Your output will be </p> <pre><code>gnirts_ym </code></pre> <p>For more information on how this works, have a look at <a href="http://pythoncentral.io/h...	-3	2016-10-16T14:37:58Z	[ "python", "string", "python-3.x" ]
python import error: cannot open shared object file	40,071,541	<p>My python code gives this error:</p> <p><code>from cv_bridge import CvBridge, CvBridgeError</code> </p> <p>ImportError: libcv_bridge.so: cannot open shared object file: No such file or directory.</p> <p>However if I do a ldd, every thing seems fine. What is wrong? (ROS indigo, ubuntu 14.04 LTS, PyCharm)</p> <pre...	0	2016-10-16T14:42:11Z	40,071,962	<p>You need to export the relevant LD LIBRARY path and add it in your bash profile file as in this example:</p> <p><a href="http://stackoverflow.com/questions/7880454/python-executable-not-finding-libpython-shared-library">Python executable not finding libpython shared library</a></p>	0	2016-10-16T15:25:01Z	[ "python", "ldd" ]

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