click_helper.py 文件源码

def validate(type_scheme: Type) -> t.Callable[[click.Context, str, t.Any], t.Any]:
    """
    Creates a valid click option validator function that can be passed to click via the callback
    parameter.
    The validator function expects the type of the value to be the raw type of the type scheme.

    :param type_scheme: type scheme the validator validates against
    :return: the validator function
    """
    def func(ctx, param, value):
        param = param.human_readable_name
        param = param.replace("-", "")
        res = verbose_isinstance(value, type_scheme, value_name=param)
        if not res:
            raise click.BadParameter(str(res))
        return value
    return func