Thank you Carl and thank you Jarek. This makes me feel much better -- on to coding, I shall go. :)
Thanks again, Wojciech On Oct 4, 11:27 am, Carl Banks <[EMAIL PROTECTED]> wrote: > On Oct 4, 11:11 am, Wojciech Gryc <[EMAIL PROTECTED]> wrote: > > > Hi, > > > I recently started using Python and am extremely happy with how > > productive it's made me, even as a new user. I'm hoping to continue > > using the language for my research, and have come across a bit of a > > stumbling block. > > > I'm a seasoned Java programmer and quite a big fan of interfaces... > > i.e. The idea that if I make a number of distinct classes that > > implement interface X, I can pass them all as parameters to functions > > or whatnot that require an X object. > > > Is there something similar in Python? > > Yes: you do it pretty much the same way you'd do it in Java, except > for two differences: > * leave out the "implements Interface" part > * don't actually create an Interface class > > And then, voila!, you can write functions that can accept any class > that implements your interface. > > > What I'd like to do is create a feature detection system for my work > > -- specifically, a general class / interface called "Feature" and then > > subclasses that implement functions like isFeaturePresent() in all of > > their different and unique ways. I'd love to hear how I can do this in > > Python. > > Just define isFeaturePresent() in any class you want. That's all you > have to do; any class that defines this method can be passed to any > function that invokes it, without having to "implement" or "subclass" > anything. > > This is known as "duck typing" in Python lingo. > > Carl Banks -- http://mail.python.org/mailman/listinfo/python-list
