On Feb 20, 8:20 pm, Chris Rebert <c...@rebertia.com> wrote: > On Fri, Feb 20, 2009 at 5:12 PM, Darren Dale <dsdal...@gmail.com> wrote: > > I would like to assert that a method accepts certain types. I have a > > short example that works: > > > from functools import wraps > > > def accepts(*types): > > def check_accepts(f): > > �...@wraps(f) > > def new_f(self, other): > > assert isinstance(other, types), \ > > "arg %r does not match %s" % (other, types) > > return f(self, other) > > return new_f > > return check_accepts > > > class Test(object): > > > �...@accepts(int) > > def check(self, obj): > > print obj > > > t = Test() > > t.check(1) > > > but now I want Test.check to accept an instance of Test as well. Does > > anyone know how this can be accomplished? The following class > > definition for Test raises a NameError: > > > class Test(object): > > > �...@accepts(int, Test) > > def check(self, obj): > > print obj > > You're going to have to either inject it after the class definition > somehow, or give the class name as a string and use eval() or similar. > The class object doesn't exist until the entire class body has > finished executing, so you can't refer to the class within its own > body.
Thats too bad, thanks for clarifying. -- http://mail.python.org/mailman/listinfo/python-list
