筑波大のGPA計算

gpa.py

import csv
import sys

argv = sys.argv

if (len(argv) != 2):
    print("Usage: python3 {} gpa.csv".format(argv[0]))
    quit()

total_amount = 0
total_gp = 0

gp_map = {'A+': 4.3, 'A': 4, 'B': 3, 'C': 2}

filename = argv[1]

with open(filename, 'r') as f:
    reader = csv.reader(f)
    header = next(reader)

    for row in reader:
        classification = row[8]
        evaluation = row[6]

        if classification == 'C0' or evaluation in ['P', 'F']: continue

        gp = gp_map.get(evaluation, 0)

        amount = float(row[5])

        total_amount += amount
        total_gp += gp * amount

print("Your GPA is {}.".format(total_gp / total_amount))