Calculating p-distance for multiple fast files

Question

[Miguy]

Hi, I have over 3000 fasta alignment files, I want to calculate the p-distance for each fasta file and print the results in a new text file. I have been using python and perl scripts I've found online but none of them can handle this large number files and errors out with the message "Memory error". Does anyone know of program or script that could handle this many fasta files. Thank you.

[Jean-Karim Heriche]

If you just need one p-distance per fasta file, why can't you just read them one by one and compute the distance ?

[Miguy]

That means I would have to type in the command three thousand times, each time for each fast file. Not very time efficient. Thanks

[h.mon]

What about a loop?