How should functions be tested for equality or identity?

Question

I would like to be able to test whether two callable objects are the same or not. I would prefer identity semantics (using the \"is\" operator), but I\'ve discovered that wh

Answer 1

While I don't have answers to all of your questions, I suspect the trick is to use __func__ for callables that have it (i.e. for methods):

In [32]: def same_func(func1, func2):
   ....:     if hasattr(func1, '__func__'):
   ....:         func1 = func1.__func__
   ....:     if hasattr(func2, '__func__'):
   ....:         func2 = func2.__func__
   ....:     return func1 is func2
   ....: 

In [33]: same_func(b, foo.bar)
Out[33]: True

In [34]: same_func(f, fun)
Out[34]: True

In [35]: same_func(foo.met, fun)
Out[35]: True

In [36]: same_func(c, foo.can)
Out[36]: True