函数名在python类中未定义 [英] function name is undefined in python class

问题描述

我对 python 比较陌生，我在命名空间方面遇到了一些问题.

I am relatively new to python and i am experiencing some issues with namespacing.

class a:
    def abc(self):
        print "haha" 
    def test(self):
        abc()

b = a()
b.test() #throws an error of abc is not defined. cannot explain why is this so

推荐答案

由于 test() 不知道谁是 abc，所以 msg NameError:全局名称 'abc' 未定义 您看到应该在调用 b.test() 时发生(调用 b.abc() 很好)，更改它:

Since test() doesn't know who is abc, that msg NameError: global name 'abc' is not defined you see should happen when you invoke b.test() (calling b.abc() is fine), change it to:

class a:
    def abc(self):
        print "haha" 
    def test(self):
        self.abc()  
        # abc()

b = a()
b.abc() #  'haha' is printed
b.test() # 'haha' is printed

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