Removed unnecessary comments and added more information at exception handling in downloader.py

listdownloader/downloader.py

@@ -111,8 +111,9 @@ def download_file(url, to_dir):
             ext = info.get_content_subtype()
             if len(file_name) < len(ext) or file_name[-len(ext):] != ext: # add file extension if not present
                 file_name += "." + ext
-    except urllib.error.URLError:
-        sys.stderr.write("Skipping invalid URL, or possibly failed to get URL: " + url)
+    except urllib.error.URLError as e:
+        sys.stderr.write("Skipping invalid URL, or possibly failed to get URL: " + url
+                         + "\nError message: " + str(e) + "\n")
         return
 
     target_path = os.path.join(to_dir, file_name)