Divide by zero error on number 7


#1


  1. Sending a Letter

Traceback (most recent call last):
File "python", line 42, in
File "python", line 27, in get_average
File "python", line 24, in average
ZeroDivisionError: float division by zero


It didnt pop up in previous exercises, and I cant figure it out


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)
    total = total / len(numbers)
    return total
def get_average(student):
    homework=average(student["homework"])*.1
    quizzes=average(student["quizzes"])*.3
    tests=average(student["tests"])*.6
    return homework+quizzes+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(get_average(lloyed))


#2

This might be the cause of the error. The division is fine, otherwise.


#3

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