修改函数默认值
def func(a, b=9, c=33): print(a, b, c) func(98) # 98 9 33 func.__defaults__ # (9, 33) func.__defaults__ = 125, 620 func.__defaults__ # (125, 620) 修改了 b c 的默认值 func(98) # 98 125 620 func.__defaults__ = 8866 # TypeError: __defaults__ must be set to a tuple object func.__defaults__ = 8866, func.__defaults__ # (8866,) func(98) # TypeError: func() missing 1 required positional argument: 'b' func(98, 'Hello') # 98 Hello 8866 # c的 默认值 被修改成了 8866