class needs to refer a different class

[ndc85430]

this is big, so i am not going to post it here. instead, you get a link:
http://ipal.net/python/zopen.py

Yes, there's a lot of code there and it's not too helpful. A really good way to describe in code what you're wanting to do is to write a test. Why? It helps you clarify what you're trying to achieve and to focus on one small part of the problem. "Programming by wishful thinking" is basically what we're doing when we do test-driven development, for those reasons.

Also, when you do want to share your project with people, why provide these individual links, rather than just one link to a repository? That would make it easier for people to get everything and play around with it.