# 7. Sending a letter

#1

My code could work but the result of score was wrong (all students were "A").
Where lacked something please let me know.
Thanks.

80< score <90 should be "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]
}

students=[lloyd,alice,tyler]

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

def get_average(student):
homework = average(student["homework"])
quizzes = average(student["quizzes"])
tests = average(student["tests"])
#print sum((0.1*homework,0.3*quizzes,0.6*tests))
return sum((0.1*homework,0.3*quizzes,0.6*tests))

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

for key in students:
print key["name"]
print "average:" ;print get_average(key)
print "score:"

The result showed

Lloyd
average:
80.55
score:
A
Alice
average:
91.15
score:
A
Tyler
average:
79.9
score:
A
None

#2

The problem is that when you call get_letter_grade(), the argument that you pass is not the result of the get_average() function.

It supposed to be like this:

``print get_letter_grade(get_average(key))``

#3

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