Hi, Thanks for the responses.
On Mar 28, 4:01 pm, "Michael Spencer" <[EMAIL PROTECTED]> wrote: > "7stud" <[EMAIL PROTECTED]> wrote in message > > news:[EMAIL PROTECTED]> Hi, > > > Can someone show me how to manually implement staticmethod()? Here is > > my latest attempt: > > ---------------- > > Raymond Hettinger can: > > http://users.rcn.com/python/download/Descriptor.htm#static-methods-an... I was using that article to help me. My problem was I was trying to implement smeth() as a function rather than a class. I hacked around some more, and I came up with the following before peeking at this thread for the answer: class smeth(object): def __init__(self, func): self.func = func def __getattribute__(self, name): print "smeth -- getattribute" return super(smeth, self).__getattribute__(name) def __get__(self, inst, cls=None): print "smeth get" return self.func class Test(object): def __getattribute__(self, name): print "Test - gettattribute" return super(Test, self).__getattribute__(name) def f(): print "executing f()" return 10 f = smeth(f) print Test.f #displays function obj not unbound method obj! Test.f() However, my code does not seem to obey this description in the How-To Guide to Descriptors: --------- Alternatively, it is more common for a descriptor to be invoked automatically upon attribute access. For example, obj.d looks up d in the dictionary of obj. If d defines the method __get__, then d.__get__(obj) is invoked according to the precedence rules listed below.***The details of invocation depend on whether obj is an object or a class***. ... For objects, the machinery is in object.__getattribute__ which transforms b.x into type(b).__dict__['x'].__get__(b, type(b)). ... For classes, the machinery is in type.__getattribute__ which transforms B.x into B.__dict__['x'].__get__(None, B). --------- When I examine the output from my code, Test.f does not call Test.__getattribute__(), instead it calls smeth.__get__() directly. Yet that last sentence from the How-To Guide to Descriptors seems to say that Test.__getattribute__() should be called first. I'm using python 2.3.5. On Mar 29, 9:34 am, [EMAIL PROTECTED] (Alex Martelli) wrote: > Simplest way: > > class smethod(object): > def __init__(self, f): self.f=f > def __call__(self, *a, **k): return self.f(*a, **k) > > Alex Interesting. That looks like a functor to me. Thanks. I notice that __get__() overrides __call__(). -- http://mail.python.org/mailman/listinfo/python-list
