On Jul 9, 2012, at 12:42 PM, Walter Prins wrote: > Hi Chris > >> So, I have to admit, imports have me really confused. I am trying to break >> apart a 10,000+ line single file into various files, one for each class, and >> one containing a whole bunch of functions which are used by a lot of >> classes. Some of those functions use calls to methods in a Class. Even >> though the Class has been imported, I get a nameError where trying to use >> the class. I have read about Classes and packages and modules, but import >> just has me confused. > > How did you import the class? Or did you perhaps not import the Class > itself, but rather the module containing the class?
I am doing import NAME where name is not only the name of the class, but also the name of the file containing the class. The only reasons I am trying to break up the file is because it is getting to difficult to find stuff. Some of the content hasn't change while other parts are still in flux a lot. I figured that splitting it into the various files will make it easier to edit. so I think I have figured out the problem based upon the resources you specified - the first one helped a bunch. I was using import functions import os import db when everything was all in one file, that worked just fine. Now, with it all split up, once I changed r = DbPath() to r = functions.DbPath() things seems to work now. I hope this is it!!! Now, I have a bunch of smaller, more manageable files instead of trying to edit one ginormous one :-) Thanks! > > Read this article which explains a bit about Python namespaces: > http://is.gd/e8PAZW (but I note there's a bit of conflation of > "class" and "class instance" going on at the end.) > > Also read this page from the Python documentation, section "Python > Scopes and Namespaces": http://docs.python.org/tutorial/classes.html > > If a class is defined in a module (e.g. in the namespace of the > module), and you "import module" the module into the your current > namespace, then from within the current namespace you can access the > class with "module.Class". If however you import the class itself, > e.g. "from module import Class", into your current namespace, then the > Class itself is directly part of your local namespace and you must > therefore access it unqualified as just "Class". Thanks for the links -- yep - it helped, although I haven't solved my specific problem yet. > > HTH, > > Walter > _______________________________________________ > Tutor maillist - Tutor@python.org > To unsubscribe or change subscription options: > http://mail.python.org/mailman/listinfo/tutor _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
