How to use the fastjsonschema.generator.enforce_list function in fastjsonschema

def generate_type(self):
        """
        Validation of type. Can be one type or list of types.

        .. code-block:: python

            {'type': 'string'}
            {'type': ['string', 'number']}
        """
        types = enforce_list(self._definition['type'])
        try:
            python_types = ', '.join(JSON_TYPE_TO_PYTHON_TYPE[t] for t in types)
        except KeyError as exc:
            raise JsonSchemaDefinitionException('Unknown type: {}'.format(exc))

        extra = ''
        if ('number' in types or 'integer' in types) and 'boolean' not in types:
            extra = ' or isinstance({variable}, bool)'.format(variable=self._variable)

        with self.l('if not isinstance({variable}, ({})){}:', python_types, extra):
            self.exc('{name} must be {}', ' or '.join(types), rule='type')

def generate_type(self):
        """
        Validation of type. Can be one type or list of types.

        Since draft 06 a float without fractional part is an integer.

        .. code-block:: python

            {'type': 'string'}
            {'type': ['string', 'number']}
        """
        types = enforce_list(self._definition['type'])
        try:
            python_types = ', '.join(JSON_TYPE_TO_PYTHON_TYPE[t] for t in types)
        except KeyError as exc:
            raise JsonSchemaDefinitionException('Unknown type: {}'.format(exc))

        extra = ''

        if 'integer' in types:
            extra += ' and not (isinstance({variable}, float) and {variable}.is_integer())'.format(
                variable=self._variable,
            )

        if ('number' in types or 'integer' in types) and 'boolean' not in types:
            extra += ' or isinstance({variable}, bool)'.format(variable=self._variable)

        with self.l('if not isinstance({variable}, ({})){}:', python_types, extra):