实例化类时报:TypeError: __init__() missing 1 required positional argument:

chase001

为什么实例化类时报:TypeError: __init__() missing 1 required positional argument:

class Counter:
        def __init__(self,counter):
                self.counter = counter
        def __setattr__(self, name, value):
                self.counter += 1
                super().__setattr__(name, value)
        def __delattr__(self, name):
                self.counter -= 1
                super().__delattr__(name)

>>>c = Counter()
Traceback (most recent call last):
  File "<pyshell#16>", line 1, in <module>
    c = Counter()
TypeError: __init__() missing 1 required positional argument: 'counter'

SixPy

def __init__(self,counter):

老甲鱼与小甲鱼

提示很明白了啊，missing 1 required positional argument缺少一个参数

老甲鱼与小甲鱼

c = Counter()这个括号里面应该给个参数