# 7/9 why doesn't this way work?

#1

Using this code, I was able to get the right output, which is “B”.

``````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 = average(student["homework"])
quizzes = average(student["quizzes"])
tests = average(student["tests"])
score = 0.1 * homework + 0.3 * quizzes + 0.6 * tests
return score

if score >= 90:
return "A"
elif score >= 80:
return "B"
elif score >= 70:
return "C"
elif score >= 60:
return "D"
else:
return "F"

``````

when I changed the latter part to

``````print get_letter_grade(lloyd)

``````

the output was A.

Why is this? I assumed both would be the same. By only using the function {get_letter_grade}, you would still have to make use of the {score} variable, even if we’re not using the {get_average} function.

#2

These lines added to end of source code…

``````print (get_letter_grade(get_average(lloyd)))

``````

Note the first result, and the second.

``````=========== RESTART: D:/cc/discuss/users/jsy-c/student-teacher.py ===========
B
Traceback (most recent call last):
File "D:/cc/discuss/users/jsy-c/student-teacher.py", line 48, in <module>