doctest.py

import hashlib
class Klass(object):
    def func(self):
        """Ohai from Klass.func"""
        print self.func.__doc__
        
def Func():
    """Ohai from __main__.Func"""
    print Func.__doc__


k = Klass()
k.func() # Ohai from Klass.func

Func() # Ohai from __main__.Func