I thought I knew a bit of Python, but then I stumped on this (a distilled form follows):

class A:

    @staticmethod
    def f():
        print('what code should be here?')

class B:

    @staticmethod
    def f():
        A.f()

class C:

    @staticmethod
    def f():
        A.f()

B.f() # I want this to print 'B'
C.f() # I want this to print 'C'

Note: compared to How can I get the address of the caller function?, this question describes a much more difficult situation (in my opinion). In fact, the referred question is easily solvable using an iteration over globals (see below).

Here’s what I tried:

1. If I use the inspect module I get access to the the caller function’s name as a str (not the caller function’s object itself), and so I can’t use the __qualname__.

2. If I try to iterate over the globals to see which global object has a method named ‘f’ I get two answers with no way to decide between the two.

3. I thought that an attribute ‘cls’ should be among the locals, just like ‘self’ would be if these were regular functions (not static methods), and if so I could get to the class by inspect.stack()[1][0].f_locals['cls'], but ‘cls’ is not there.

Any ideas?