def add_unit_metadata ( self , unit ) :
    "str"
    super ( RedirectFileContext , self ) . add_unit_metadata ( unit )
    image_id = unit . unit_key [ "str" ]
    unit_data = {
        "str" : image_id }
    string_representation = json . dumps ( unit_data )
    self . metadata_file_handle . write ( string_representation )

def add_unit_metadata ( self , unit ) :
    "str"
    super ( RedirectFileContext , self ) . add_unit_metadata ( unit )
    image_id = unit . unit_key [ "str" ]
    unit_data = {
        "str" : image_id
    }
    string_representation = json . dumps ( unit_data )
    self . metadata_file_handle . write ( string_representation )

次に示すpythonコードの誤りを修正しなさい。