def fmt(self, value):
        """ Sets self.fmt, with some extra help for plain format strings. """
        if isinstance(value, str):
            value = value.split(self.join_str)
        if not (value and isinstance(value, (list, tuple))):
            raise TypeError(
                ' '.join((
                    'Expecting str or list/tuple of formats {!r}.',
                    'Got: ({}) {!r}'
                )).format(
                    self.default_format,
                    type(value).__name__,
                    value,
                ))
        self._fmt = value
def fmt ( self , value ) : if isinstance ( value , str ) : value = value . split ( self . join_str ) if not ( value and isinstance ( value , ( list , tuple ) ) ) : raise TypeError ( ' ' . join ( ( 'Expecting str or list/tuple of formats {!r}.' , 'Got: ({}) {!r}' ) ) . format ( self . default_format , type ( value ) . __name__ , value , ) ) self . _fmt = value
Sets self.fmt, with some extra help for plain format strings.