How to link two python scripts

[Larz60+]

I took a look at: https://gist.github.com/mfoll/04d751165416a4466001
which is where I assume you got the first script.
He states that the code is very slow, and it's not well formatted to include as an import file.
You need it to be a class , or at least a function.
so, a couple of questions.

• the fasta format is pretty simple, but the header is free form. I guessing that the Bio.SeqIo.Parse is reading in sequences one by one, and then printing the output.
  
• what does the header look like?
  
• what do you want the output to look like?
  
• could you show a sample of the fasta data?
  

If you give me this, I can show how to create a script that will be fast, and can be imported into your program very easily.
The sequence doesn't have to be something that your working on, so long as the header format is the same.