init.py 文件源码

def default_prompt(msg: str, default: t.Optional = None, **kwargs):
    """
    Wrapper around prompt that shows a nicer prompt with a default value that isn't editable.
    Interpretes the empty string as "use default value".

    :param msg: message
    :param default: default value
    :param kwargs: arguments passed directly to the prompt function
    :return: user input
    """
    msg = message(msg, default)
    if default is not None and "validator" in kwargs:
        vali = kwargs["validator"]
        if isinstance(vali, TypeValidator):
            vali.allow_empty = True
        if isinstance(vali, WordValidator):
            vali.allow_empty = True
    res = prompt(msg, **kwargs)
    if res == "" and default is not None:
        return default
    return res