Upload ozone.py

ozone.py

@@ -292,6 +292,8 @@ class Ozone(datasets.GeneratorBasedBuilder):
         data = pandas.read_csv(filepath)
         data.drop("Date", axis="columns", inplace=True)
         data.loc[:, "Class"] = data.Class.astype(int)
+        data = data[~(data.isin(["?"]).any(axis=1))]
+        data = data.infer_objects()
 
         for row_id, row in data.iterrows():
             data_row = dict(row)