Sending a letter

#1

Hi,

My following code passed and printed an average of 80.55 and an “F” (when is should be a “B”). Why is that?

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)

def get_average(student):
homework= 0.1average(student[“homework”])
quizzes= 0.3
average(student[“quizzes”])
tests= 0.6*average(student[“tests”])

print homework+quizzes+tests

if score >= 90.0:
return “A”
elif score >= 80.0 and score < 90.0:
return “B”
elif score >=70.0 and score < 80.0:
return “C”
elif score >=60.0 and score < 70.0:
return “D”
else:
return “F”

#2

`get_average(lloyd)` returns None, so you pass None to get_letter_grade function call, which will give F (given None isn’t greater then any of the integer values)

#3

Why does it return None? How do I fix it so I can get it to print the appropriate letter grade?

#4

because None is the default returned value. If we want to return something else, use the `return` keyword

the return statement should have been added in the lesson you made the get_average function, maybe revisit that exercise?

#5

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