| # (c) 2005 Ian Bicking and contributors; written for Paste (http://pythonpaste.org) |
| # Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php |
| |
| class classinstancemethod(object): |
| """ |
| Acts like a class method when called from a class, like an |
| instance method when called by an instance. The method should |
| take two arguments, 'self' and 'cls'; one of these will be None |
| depending on how the method was called. |
| """ |
| |
| def __init__(self, func): |
| self.func = func |
| self.__doc__ = func.__doc__ |
| |
| def __get__(self, obj, type=None): |
| return _methodwrapper(self.func, obj=obj, type=type) |
| |
| class _methodwrapper(object): |
| |
| def __init__(self, func, obj, type): |
| self.func = func |
| self.obj = obj |
| self.type = type |
| |
| def __call__(self, *args, **kw): |
| assert 'self' not in kw and 'cls' not in kw, ( |
| "You cannot use 'self' or 'cls' arguments to a " |
| "classinstancemethod") |
| return self.func(*((self.obj, self.type) + args), **kw) |
| |
| def __repr__(self): |
| if self.obj is None: |
| return ('<bound class method %s.%s>' |
| % (self.type.__name__, self.func.func_name)) |
| else: |
| return ('<bound method %s.%s of %r>' |
| % (self.type.__name__, self.func.func_name, self.obj)) |
