student.py

lloyd = {
    "name": "Lloyd",
    "homework": [90.0, 97.0, 75.0, 92.0],
    "quizzes": [88.0, 40.0, 94.0],
    "tests": [75.0, 90.0]
}
alice = {
    "name": "Alice",
    "homework": [100.0, 92.0, 98.0, 100.0],
    "quizzes": [82.0, 83.0, 91.0],
    "tests": [89.0, 97.0]
}
tyler = {
    "name": "Tyler",
    "homework": [0.0, 87.0, 75.0, 22.0],
    "quizzes": [0.0, 75.0, 78.0],
    "tests": [100.0, 100.0]
}

weight = {
    "homework" : 0.1,
    "quizzes" : 0.3,
    "tests" : 0.6
}
# Add your function below!
def average(numbers):
    total = 0.0
    total += sum(numbers)
    result = total / len(numbers)
    return result
# return avenrage point of student
def get_average(student):
    total = 0.0
    for item in student:
        if(item != "name"):
            total += weight[item] * average(student[item])
    return total
# get letter of the student
def get_letter_grade(score):
    if(score >= 90):
        return "A"
    elif(score >= 80 and score < 90):
        return "B"
    elif( score >=70 and score < 80):
        return "C"
    elif( score >=60 and score < 70):
        return "D"
    else:
        return "F"
students = [lloyd,alice,tyler]
def get_class_average(students):
    result = []
    for student in students:
        result.append(get_average(student))
    return average(result)
print get_class_average(students)
print get_letter_grade(get_class_average(students))