Traceback (most recent call last):
File "data_process.py", line 134, in <module>
arr = convert_csv_to_arr("adult.test.csv", mean_std)
File "data_process.py", line 102, in convert_csv_to_arr
arr = df_to_arr(df)
File "data_process.py", line 56, in df_to_arr
val = attr_classes[col].index(raw_val)
ValueError: '<=50K.' is not in list