Part of the whole: solved but still meh


#1



https://www.codecademy.com/en/courses/python-beginner-en-qzsCL/1/4?curriculum_id=4f89dab3d788890003000096


hi there, i was going mad at this exercise for just an indented error. The missplaced "return" gave me a wrong avg number > Oops, try again. get_class_average([alice, lloyd]) returned 91.15 instead of 85.85 as expected
after a while i realized that THIS:
def get_class_average(students):
results=[]
for student in students:
results.append(get_average(student))
____ _return average(results)
was different than THIS

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

can someone pls explain to me why a TAB changed the value of the whole code?!?
Thankssssss


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)
    return float(total) / len(numbers)

def get_average(student):
    homework= average(student['homework'])
    quizzes= average(student['quizzes'])
    tests= average(student['tests'])
    total = 0.1 * average(student['homework']) +  0.3 * average     (student['quizzes']) +  0.6 * average(student['tests'])
    return total
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)


#2

The reason is because of python's built in syntax. Because it doesn't use curly braces like java or something for functions/statements/etc, it needs indentation to know what code is in a function and what is outside, for example.

if the code is like this:

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

The return statement is inside of the function but outside of the for loop
BUT

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

The return statement is inside of the function AND inside of the for loop


#3

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