algo_grades.py

import sys

hws = [0, 0, 0, 0, 0, 0]
mid1 = 0
mid2 = 0

def calcFinalNeeded(target, hws, mid1, mid2):
    hw_avg = sum(hws) / 290 * .2 * 100
    target_exam_avg = target - hw_avg
    method1_grade = (target_exam_avg - 20*mid1/150 - 20*mid2/150)/40*100
    method2_grade = (target_exam_avg - 25*mid2/150)/55*100

    return min(method1_grade, method2_grade)

if len(sys.argv) >= 2:
    target = int(sys.argv[1])
    print(str(target) + ": " + str(calcFinalNeeded(target, hws, mid1, mid2)))
else:
    for target in range(10, 100, 10):
        print(str(target) + ": " + str(calcFinalNeeded(target, hws, mid1, mid2)))