如何在 Python 中嵌套方法

Question

This is a pretty basic question however, I struggled to find any answers online.

I know that we can nest functions, however I wanted to see if we could do the same with methods in classes

Consider the example below:

class name:
     def name(self):
            def name2(self):
                print("Hello world!")
             return self.name2()
    
 m = name()
 m.name()

Whenever I run the following code I get this error:

AttributeError: 'name' object has no attribute 'name2'

I would highly appreciate it if someone could help me find a solution.

Answer 1

Your code makes no sense. name2 is just a local variable of the name method, and a regular function.

class name:
     def name(self):
         def name2():
             print("Hello world!")
         return name2()
    
 m = name()
 m.name()

there, that works.

Python methods are function attributes of class objects , they're not special or especially magical, but they certainly can't be defined as locals.

I have no idea what you're trying to achieve or what your mental model of the entire thing is, but I'm not sure either makes any sense.

Answer 2

I think you're misunderstanding the way python classes work. If you've defined a standalone function inside a method, the function doesn't automatically become a member of a class.

Rather you've defined a function just like any other function with the addition of a scope . The scope limits the visibility of the function within the method name() .

I think this sums of your query and more.