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>>> class Ball:
def setname(name):
self.name = name
print(self.name)
>>> a = Ball()
>>> b = Ball()
>>> a.setname('a')
Traceback (most recent call last):
File "<pyshell#36>", line 1, in <module>
a.setname('a')
TypeError: setname() takes 1 positional argument but 2 were given
>>> b.setname('b')
Traceback (most recent call last):
File "<pyshell#37>", line 1, in <module>
b.setname('b')
TypeError: setname() takes 1 positional argument but 2 were given
为什么缺少self参数后会报这样的错误?
任何一个类对象调用函数的时候都默认有一个self参数
你写a.setname('a')除了‘a',还有self
但是你的函数定义中没有self,所以报错
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