input_validation.py 文件源码

def _expect_bounded(make_bounded_check, __funcname, **named):
    def valid_bounds(t):
        return (
            isinstance(t, tuple)
            and len(t) == 2
            and t != (None, None)
        )

    for name, bounds in iteritems(named):
        if not valid_bounds(bounds):
            raise TypeError(
                "expect_bounded() expected a tuple of bounds for"
                " argument '{name}', but got {bounds} instead.".format(
                    name=name,
                    bounds=bounds,
                )
            )

    return preprocess(**valmap(make_bounded_check, named))