pdb's whatis command prints 'Function' instead of 'Method' for a bound method:

> python.bat
Running Release|Win32 interpreter...
Python 3.10.0a0 (heads/master-dirty:12695f4c6d, Aug 21 2020, 15:48:06) [MSC v.1916 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> class MyClass:
...     def mymethod(self):
...         pass
...
>>> import pdb
>>> pdb.set_trace()
--Return--
> <stdin>(1)<module>()->None
(Pdb) whatis MyClass().mymethod
Function mymethod
(Pdb) MyClass().mymethod
<bound method MyClass.mymethod of <__main__.MyClass object at 0x0131D5C8>>
(Pdb)

The reason for this that it first checks whether there is a __code__ attribute (which both methods and functions have) and only afterwards checks for __func__.__code__. 

I will submit a patch with a test and fix shortly.

It should really use inspect.* functions but I think that should be done separately from this fix.

New changeset 022bc7572f061e1d1132a4db9d085b29707701e7 by Irit Katriel in branch 'master':
bpo-41609: Fix output of pdb's whatis command for instance methods (GH-21935)
https://github.com/python/cpython/commit/022bc7572f061e1d1132a4db9d085b29707701e7

New changeset 641279e6e51b5d2e10d3fbffe6330e47c94c4bb2 by Miss Islington (bot) in branch '3.8':
bpo-41609: Fix output of pdb's whatis command for instance methods (GH-21935) (#21976)
https://github.com/python/cpython/commit/641279e6e51b5d2e10d3fbffe6330e47c94c4bb2

New changeset 7361451b97a30de0e758094ac83a1fb1f01ed5bb by Miss Islington (bot) in branch '3.9':
bpo-41609: Fix output of pdb's whatis command for instance methods (GH-21935) (#21977)
https://github.com/python/cpython/commit/7361451b97a30de0e758094ac83a1fb1f01ed5bb

Thank you for your contribution, Irit!