nan values

b2w-reviews01.py

@@ -59,21 +59,17 @@ class Reviews(datasets.GeneratorBasedBuilder):
     def _generate_examples(self, filepath):
         def process_row(row):
 
-            row["overall_rating"] = int(row["overall_rating"])
-
-            try:
-                row["reviewer_birth_year"] = int(float(row["reviewer_birth_year"]))
-            except ValueError:
-                row["reviewer_birth_year"] = None
-
             for key, value in row.items():
                 if pd.isnull(value):
                     row[key] = None
 
+            row["overall_rating"] = int(row["overall_rating"])
+
+            if row["reviewer_birth_year"] is not None:
+                row["reviewer_birth_year"] = int(float(row["reviewer_birth_year"]))
+
             return row
 
         records = pd.read_csv(filepath).to_dict("records")
         for idx, row in enumerate(records):
-            if idx < 10:
-                print(row)
             yield idx, process_row(row)