1# (c) 2005 Ian Bicking and contributors; written for Paste (http://pythonpaste.org)
2# Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php
3
4class classinstancemethod(object):
5    """
6    Acts like a class method when called from a class, like an
7    instance method when called by an instance.  The method should
8    take two arguments, 'self' and 'cls'; one of these will be None
9    depending on how the method was called.
10    """
11
12    def __init__(self, func):
13        self.func = func
14        self.__doc__ = func.__doc__
15
16    def __get__(self, obj, type=None):
17        return _methodwrapper(self.func, obj=obj, type=type)
18
19class _methodwrapper(object):
20
21    def __init__(self, func, obj, type):
22        self.func = func
23        self.obj = obj
24        self.type = type
25
26    def __call__(self, *args, **kw):
27        assert 'self' not in kw and 'cls' not in kw, (
28            "You cannot use 'self' or 'cls' arguments to a "
29            "classinstancemethod")
30        return self.func(*((self.obj, self.type) + args), **kw)
31
32    def __repr__(self):
33        if self.obj is None:
34            return ('<bound class method %s.%s>'
35                    % (self.type.__name__, self.func.func_name))
36        else:
37            return ('<bound method %s.%s of %r>'
38                    % (self.type.__name__, self.func.func_name, self.obj))
39