A question about Part of the Whole


#1

Hi.
I am using this course. I just wanted to know something.
Take a look at my code:

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]
}

# Add your function below!
def average(numbers):
    total = sum(numbers)
    total = float(total)
    return total / len(numbers)
def get_average(student):
    homework = average(student["homework"])
    tests = average(student["tests"])
    quizzes = average(student["quizzes"])
    homework = homework*.10
    tests = tests*.60
    quizzes = quizzes*.30
    return tests+homework+quizzes
def get_letter_grade(score):
    if score >= 90:
        return "A"
    elif score >= 80:
        return "B"
    elif score >= 70:
        return "C"
    elif score >= 60:
        return "D" 
    else:
        return "F"
    
print get_letter_grade(get_average(lloyd))

def get_class_average(students):
    results = []
    for student in students:
        results.append(get_average(student))
    return average(results)

Do you see the "for student in students" line in the final function? Why do I use "in students"? When did I make "students" list? Can I just write "student in potatoes"? I just couldn't see why. If you could tell me , I'd appreciate it.


#2

okay got it. It is the argument of the function.


#3

Be sure to create the expected students list,

students = [lloyd, alice, tyler]

Insert it just below your existing data dictionaries.


#4

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