def validate_mandatory_str_fields(self, messages):
        """Fields marked as Mandatory and of type string in class
        docstring must be of a type that provides __str__ method.
        """
        FIELDS = ['name', 'download_location', 'verif_code', 'cr_text']
        messages = self.validate_str_fields(FIELDS, False, messages)

        return messages
def validate_mandatory_str_fields(self, messages):
        """Fields marked as Mandatory and of type string in class
        docstring must be of a type that provides __str__ method.
        """
        FIELDS = ['name', 'download_location', 'verif_code', 'cr_text']
        messages = self.validate_str_fields(FIELDS, False, messages)

        return messages
def validate_mandatory_str_fields ( self , messages ) : FIELDS = [ 'name' , 'download_location' , 'verif_code' , 'cr_text' ] messages = self . validate_str_fields ( FIELDS , False , messages ) return messages
Fields marked as Mandatory and of type string in class
        docstring must be of a type that provides __str__ method.
Fields marked as Mandatory and of type string in class docstring must be of a type that provides __str__ method .