On 12 dic, 08:46, "WaterWalk" <[EMAIL PROTECTED]> wrote: > Hello, I was recently learning python decorator and descriptor and > emulated a @classmethod decorator: > class EmuClassMethod(object): > def __init__(self, f=None): > self.f = f > def __get__(self, obj, klass=None): > if klass is None: > klass = type(obj) > def wrapped(*args): > return self.f(klass, *args) > return wrapped > > class Test(object): > @EmuClassMethod > def t(cls): > print "I'm %s" % cls.__name__
Basically you're right. But note that @classmethod does some additional work to keep the details: the function name is now "wrapped", no docstring, no argument names, no defaults, wrong type... >>> class Test2(object): ... @EmuClassMethod ... def t2(cls, arg1, arg2=2): ... "t2 docstring" ... print "I'm %s arg1=%s arg2=%s" % (cls.__name__, arg1, arg2) ... >>> print Test2.t2 <function wrapped at 0x00AB30B0> >>> print Test2.t2.func_name wrapped >>> print Test2.t2.__doc__ None >>> print Test2.t2.func_defaults None >>> Test2.t2(100) I'm Test2 arg1=100 arg2=2 >>> Test2.t2(arg1=100) Traceback (most recent call last): File "<stdin>", line 1, in ? TypeError: wrapped() got an unexpected keyword argument 'arg1' -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
