Small script to calculate cgpa

grades.py

#!/usr/bin/python3
# enter details as follows credit mark credit mark ..
# ex: ./grades.py 5 A- 3 A 4 B- ...
from sys import argv as rd
grades = { 'A' : 10, 'A-' : 9, 'B' : 8, 'B-' : 7, 'C' : 6, 'C-' : 5 , 'D' : 4, 'F' : 2}
courses = list(map(lambda x: [float(x[0]), grades[x[-1]]], [[x, y] for x, y in zip(rd[1:], rd[1:][1:])][::2]))
print(sum([x[0] * x[-1] for x in courses]) / sum([x[0] for x in courses]))

This script outputs your CGPA to stdout:

• chmod 755 grades.py
• ./grades.py <credit> <grade> <credit> <grade> ...