fix data-reader bugs

qa_discourse.py

@@ -52,6 +52,11 @@ _URLs = {
     "wikipedia.test": "https://github.com/ValentinaPy/QADiscourse/raw/master/Dataset/wikipedia_test.tsv",      
 }
 
+COLUMNS = ['qasrl_id', 'sentence', 'worker_id', 'full_question', 'full_answer',
+       'question_start', 'question_aux', 'question_body', 'answer',
+       'untokenized sentence', 'target indices for untok sent']
+
+
 # TODO: Name of the dataset usually match the script name with CamelCase instead of snake_case
 class QaDiscourse(datasets.GeneratorBasedBuilder):
     """QA-Discourse: Discourse Relations as Question-Answer Pairs.  """
@@ -133,10 +138,11 @@ class QaDiscourse(datasets.GeneratorBasedBuilder):
         """ Yields QA-Discourse examples from a tsv file."""
 
         # merge annotations from sections 
-        df = pd.concat([pd.read_csv(fn, sep='\t') for fn in filepaths]).reset_index()
+        df = pd.concat([pd.read_csv(fn, sep='\t', error_bad_lines=False) for fn in filepaths]).reset_index(drop=True) 
+        df = df.applymap(str) # must turn all values to strings explicitly to avoid type errors
         for counter, row in df.iterrows():
             # Prepare question (3 "slots" and question mark)
-            question = [row.question_start, row.question_aux, row.question_body.str.rstrip('?'), '?']
+            question = [row.question_start, row.question_aux, row.question_body.rstrip('?'), '?']
             
             yield counter, {
                 "sentence": row.sentence,