cli.py 文件源码

def _do_call(
            self, string, delim=",", data_type=None, choices=None,
            min_len=None, max_len=None):
        if isinstance(string, str):
            vals = string.split(delim) if delim else (string,)
        else:
            vals = string

        if vals[0] == "*" and choices is not None:
            vals = choices

        if data_type:
            vals = [data_type(v) for v in vals]

        if min_len and len(vals) < min_len:
            raise ArgumentError(
                self, "there must be at least {} values".format(min_len))

        if max_len and len(vals) > max_len:
            raise ArgumentError(
                self, "there can be at most {} values".format(max_len))

        return vals