I tried two different lines of code.
X.loc[0:, \'Type\'].fillna(\'0\', inplace=True) X.loc[:, \'Type\'].fillna(\'0\', inplace=True) Both of
X.loc[0:, \'Type\'].fillna(\'0\', inplace=True)
X.loc[:, \'Type\'].fillna(\'0\', inplace=True)