On Mar 15, 1:55 pm, [EMAIL PROTECTED] wrote: > > class Disk(Folder): > > def __init__(self,driveLetter): > > super(Disk,self).__init__(driveLetter+":/") > > What is going on there? Is it just explicitly calling the super's > init function?
What is going on is that Disk is being initialized with a single character, such as 'D', and then calling the superclass with 'D:/', the root folder on D. You're the one who said that Disk was a subclass of Folder (sorry, you called it "Data"), so I tried to come up with an example in which this made some kind of sense. > How is that really different from this: > > class Disk(Folder): > def __init__(self,driveLetter): > Folder.Folder.__init__(self.path) # ??? Being that Folder is the > superclass? > Where did self.path come from? Even though Folder is the superclass, self.path doesn't exist until the Folder.__init__ method gets called. This ain't C++ you know. And as I said above, we are taking a single character drive letter, and calling the superclass init with the root directory of that drive, so these are . > I'd like to be able to use the shared Disk objects in any class that > is a subclass of Data. Will the above method still make the Disk > objects available in File.py? Also, what if the classes are in > different modules. > > I'll try to experiment with it this afternoon. I'm using more > information than just the drive letter. What if the user wants to > find out the unc path to the share given the drive letter, or copy a > file to the local disk that is not a system disk that has the most > available space on it, or wants to mount or unmount a network drive. > Knock yourself out. I just hacked together these Folder/Disk classes by way of a half-baked-but-working example. My point is that to initialize a class level variable on class Foo, all that is needed is to assign it in the defining module, that is: class Foo: pass Foo.fooClassVar = "a class level variable" Now any Foo or sub-Foo can access fooClassVar. The type of fooClassVar can be anything you want, whether it is a Foo, subclass of Foo or whatever, as long as it has been defined by the time you assign fooClassVar. -- Paul -- http://mail.python.org/mailman/listinfo/python-list
