Question

If I have this:

class A:
    def callFunction(self, obj):
        obj.otherFunction()

class B:
    def callFunction(self, obj):
        obj.otherFunction()

class C:
    def otherFunction(self):
        # here I wan't to have acces to the instance of A or B who call me.

...

# in main or other object (not matter where)
a = A()
b = B()
c = C()
a.callFunction(c) # How 'c' know that is called by an instance of A...
b.callFunction(c) # ... or B

Despite the design or other issues, this is only a question of an inquiring mind.

Note: This has to be done without changing otherFunction signature

Answer 1

If this is for debugging purposes you can use inspect.currentframe():

import inspect

class C:
    def otherFunction(self):
        print inspect.currentframe().f_back.f_locals

Here is the output:

>>> A().callFunction(C())
{'self': <__main__.A instance at 0x96b4fec>, 'obj': <__main__.C instance at 0x951ef2c>}