Okay, Nick, I didn't know you can pass a "Class" rather then an instance. I have to chew on what your example does.
But no, I want to pass an instance of a Class. But how do I know that the calling routine *did* pass me a class - pardon me: an instance of a Class? -- It's me "Nicolas Fleury" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > It's me wrote: > >>I guess another example would be an assert on the type of argument: > >>def foo(someClass): > >> assert inspect.isclass(someClass) > >> # rest of code > >> > > But that would always fail! (I just tried it). > > Are you sure you haven't pass an instance instead of a class? Remember, > classes are also objects in Python: > > >>> import inspect > >>> class A: pass > ... > >>> def foo(a): assert inspect.isclass(a) > ... > >>> foo(A) > >>> > > Works fine and makes sense, no? Of course, if I pass an instance > instead of a class it would fail: > > >>> myA = A() > >>> foo(myA) > Traceback (most recent call last): > File "<stdin>", line 1, in ? > File "<stdin>", line 1, in foo > AssertionError > > Maybe your question is in what situations passing a class can be useful? > There's many examples and once you're used to that capability it can > be powerful. One simple example could be the generation of > documentation; since you usually want to doc your classes, not > instances. So it would make sense to do something like: > > def writeHtmlDoc(file, someClass): ... > > Regards, > Nicolas -- http://mail.python.org/mailman/listinfo/python-list
