Add better logging error when JSON loads fails

hplt_monolingual_v1_2.py

@@ -1,6 +1,8 @@
 """Data loading script for HPLT Monolingual Release v1.2."""
 
 import json
+import logging
+from json import JSONDecodeError
 from pathlib import Path
 from typing import List
 
@@ -183,8 +185,16 @@ class Hplt_monolingual_v1_2(datasets.GeneratorBasedBuilder):
 
         for pfin in pfs_data:
             with pfin.open(encoding="utf-8") as fhin:
-                for line in fhin:
-                    data = json.loads(line)
+                for line_idx, line in enumerate(fhin, 1):
+                    line = line.strip()
+                    if not line:
+                        continue
+                    try:
+                        data = json.loads(line)
+                    except JSONDecodeError as exc:
+                        logging.error(f"Error parsing JSON! Line will be skipped...\n- file {pfin}\n- line no. {line_idx:,}\n- line: {line}\n- error: {exc}")
+                        continue
+
                     yield document_idx, {
                         "id": document_idx,
                         "document_lang": data["document_lang"],