inspect.py 文件源码

def _too_many(f_name, args, kwonly, varargs, defcount, given, values):
    atleast = len(args) - defcount
    kwonly_given = len([arg for arg in kwonly if arg in values])
    if varargs:
        plural = atleast != 1
        sig = "at least %d" % (atleast,)
    elif defcount:
        plural = True
        sig = "from %d to %d" % (atleast, len(args))
    else:
        plural = len(args) != 1
        sig = str(len(args))
    kwonly_sig = ""
    if kwonly_given:
        msg = " positional argument%s (and %d keyword-only argument%s)"
        kwonly_sig = (msg % ("s" if given != 1 else "", kwonly_given,
                             "s" if kwonly_given != 1 else ""))
    raise TypeError("%s() takes %s positional argument%s but %d%s %s given" %
            (f_name, sig, "s" if plural else "", given, kwonly_sig,
             "was" if given == 1 and not kwonly_given else "were"))