Course

class Course:

    def __init__(self, name, units, status, score):
        # global get_gpa
        self.name = name
        self.units = units
        self.status = status
        self.score = score
        self.gpa = self.get_gpa()
        self.wgpa = self.gpa * self.units

    def is_between(score, lower, upper):
        return score >= lower and score <= upper

    def get_gpa(self):
        if is_between(self.score, 70, 100):
            return 7.0
        elif is_between(self.score, 65, 69):
            return 6.0
        elif is_between(self.score, 60, 64):
            return 5.0
        elif is_between(self.score, 55, 59):
            return 4.0
        elif is_between(self.score, 50, 54):
            return 3.0
        elif is_between(self.score, 45, 49):
            return 2.0
        elif is_between(self.score, 40, 44):
            return 1.0
        elif is_between(self.score, 0, 39):
            return 0.0
        else:
            raise ValueError("You entered an invalid score!")

    # def __str__():

course1 = Course("intro to computation", 3, 'compulsory', 45)
# print course1