[Tutor] Script for Parsing string sequences from a file

[Spyros Charonis]

Hello,

I'm doing a biomedical degree and am taking a course on bioinformatics. We
were given a raw version of a public database in a file (the file is in
simple ASCII) and need to extract only certain lines containing important
information. I've made a script that does not work and I am having trouble
understanding why.

when I run it on the python shell, it prompts for a protein name but then
reports that there is no such entry. The first while loop nested inside a
for loop is intended to pick up all lines beginning with "gc;", chop off the
"gc;" part and keep only the text after that (which is a protein name).
 Then it scans the file and collects all lines, chops the "gc;" and stores
in them in a tuple. This tuple is not built correctly, because as I posted
when the program is run it reports that it cannot find my query in the tuple
I created and it is certainly in the database. Can you detect what the
mistake is? Thank you in advance!

Spyros
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