# 8 - Oops, try again. get_class_average([alice, lloyd]) returned 91.15 instead of 85.85 as expected

#1

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]
}

# função para devolver as medias

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

# função para devolver a media ponderada

def get_average(student):
homework = average(student["homework"])
quizzes = average(student["quizzes"])
tests = average(student["tests"])
mediap = (homework + quizzes * 3 + tests * 6)/10
return mediap

# função para definir os scores(pontuações)

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

# função para definir a media da turma

def get_class_average(students):
for i in students:
results = []
results.append(get_average(i))
return average(results)

#2
``````students =[lloyd,alice,tyler]

def get_class_average(students):
results = []
for i in students:
results.append(get_average(i))
return average(results)``````

#3

why do we use results = [] ?

#4

results = []
print type(results); <==

You are creating an empty-list =results=
to which you will append Elements.