Well, long time without posting here, but I had been working and now I will try to post some codes that I wrote at job.
Some weeks ago I had to help a friend to analyze some domains from CATH, but the file related to those domains (CathDomainDescriptionFile) has a size of ~140Mb approx. So read that file by "hand" is a torture, so I wrote a little script in python which you can use it like a module in your programs.
You can download the python module and a test script for examples in:
[If you found some mistake in my English, please tell me.]