def _assert_is_type ( name , value , value_type ) : if not isinstance ( value , value_type ) : if type ( value_type ) is tuple : types = ', ' . join ( t . __name__ for t in value_type ) raise ValueError ( '{0} must be one of ({1})' . format ( name , types ) ) else : raise ValueError ( '{0} must be {1}' . format ( name , value_type . __name__ ) )
python assert data type check if array type
Assert that a value must be a given type .
def _assert_is_type(name, value, value_type):
    """Assert that a value must be a given type."""
    if not isinstance(value, value_type):
        if type(value_type) is tuple:
            types = ', '.join(t.__name__ for t in value_type)
            raise ValueError('{0} must be one of ({1})'.format(name, types))
        else:
            raise ValueError('{0} must be {1}'
                             .format(name, value_type.__name__))