Maki will go to college we pray

GPA.py

import sys

infile = sys.argv[1]

with open(infile, 'r') as f:
    triples = (line.split(',') for line in f)
    GRADES = [(int(t[1]), int(t[2])) for t in triples]

total_credits = sum(credits for (credits, _) in GRADES)

if total_credits != 240:
    print(r"/!\ YOU  DIDN'T ENTER 240 worth of credits!")

gpa = sum(score * weight for (weight, score) in GRADES)/total_credits

print(gpa)