gpa_calc.py

# To run using the command line enter a command in this format: python3 gpa_calc.py "A- A B"

import argparse

grades = ["B", "B+", "B-", "B+", "B+", "B", "A-", "B+", "B+"]

gpa_scale = {
    "A": 4,
    "B": 3,
    "C": 2,
    "D": 1,
}


def gpa_calc(grades=grades, gpa_scale=gpa_scale, inc=0.3, round_gpa=2):
    # Calculates GPA based on UChicago grading scale
    # Input should be a list of strings

    total = 0
    for grade in grades:
        letter = grade.strip("+-").upper()
        score = gpa_scale[letter]
        if "+" in grade:
            score += inc
        if "-" in grade:
            score -= inc
        total += score

    if round_gpa:
        return round((total / len(grades)), 2)
    else:
        return total / len(grades)


if __name__ == "__main__":
    parser = argparse.ArgumentParser(description="Get GPA")
    parser.add_argument("grades")
    args = parser.parse_args()
    print(gpa_calc(args.grades.split()))