(self, exclude=None, only=None)
This method iterates over all fields that are defined and yields
        ``(key, value)`` tuples.  Per default all fields are returned, but
        it's possible to limit that to some fields by providing the `only`
        parameter or to exclude some using the `exclude` parameter.  Both
        should be sets or tuples of field names.
This method iterates over all fields that are defined and yields
        ``(key, value)`` tuples.  Per default all fields are returned, but
        it's possible to limit that to some fields by providing the `only`
        parameter or to exclude some using the `exclude` parameter.  Both
        should be sets or tuples of field names.
This method iterates over all fields that are defined and yields ( key value ) tuples . Per default all fields are returned but it s possible to limit that to some fields by providing the only parameter or to exclude some using the exclude parameter . Both should be sets or tuples of field names .
def iter_fields(self, exclude=None, only=None):
        """This method iterates over all fields that are defined and yields
        ``(key, value)`` tuples.  Per default all fields are returned, but
        it's possible to limit that to some fields by providing the `only`
        parameter or to exclude some using the `exclude` parameter.  Both
        should be sets or tuples of field names.
        """
        for name in self.fields:
            if (
                (exclude is only is None)
                or (exclude is not None and name not in exclude)
                or (only is not None and name in only)
            ):
                try:
                    yield name, getattr(self, name)
                except AttributeError:
                    pass
def iter_fields ( self , exclude = None , only = None ) : for name in self . fields : if ( ( exclude is only is None ) or ( exclude is not None and name not in exclude ) or ( only is not None and name in only ) ) : try : yield name , getattr ( self , name ) except AttributeError : pass