Why do I always get "A"?


#1



https://www.codecademy.com/courses/python-beginner-en-qzsCL/1/3?curriculum_id=4f89dab3d788890003000096


Codecademy gives no error message.


I tried changing the values of Lloyd, but it always gives me an "A".


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]
}

def average(numbers):
    total = sum(numbers)
    total = float(total)
    total /= len(numbers)
    return total

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

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(lloyd)

I also tried this:

 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, 7.0, 5.0, 22.0],
    "quizzes": [0.0, 5.0, 8.0],
    "tests": [10.0, 10.0]
}

def average(numbers):
    total = sum(numbers)
    total = float(total)
    total /= len(numbers)
    return total

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

def get_letter_grade(score):
    if score >= 90:
        return "A"
    elif score >= 80 and score < 90:  #This is the different part
        return "B"
    elif score >= 70 and score < 80:  #This is the different part
        return "C"
    elif score >= 60 and score < 70:  #This is the different part
        return "D"
    else:
        return "F"

print get_letter_grade(lloyd)

But it also gave me an "A"


#2

Hi @ahernandezbustos,

Try this ...

print get_letter_grade(get_average(lloyd))

The above computes his average, then uses that average to compute his letter grade.


#3

Oh, thanks. That makes sense... (It is actually in the instructions... :confused:)


#4