8_Part of the Whole


#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]
}

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

def get_average(student):
homework=0.1*average(student["homework"])
quizzes=0.3*average(student["quizzes"])
tests=0.6*average(student["tests"])
total=homework+quizzes+tests
return total

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"

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

este es mi problema: Oops, try again. get_class_average([alice]) resulted in an error: list indices must be integers, not str

#2

Try this one, there is a mistake in the loop

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

#3

[

youre right... only if u got proper indentation,,,


#4

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"])
quizzes=average(student["quizzes"])
tests=average(student["tests"])
return 0.1*homework+0.3*quizzes+0.6*tests
def get_letter_grade(score):
if score>=90:
return "A"
print "A"
elif score>=80:
return "B"
print "B"
elif score>=70:
return "C"
print "C"
elif score>=60:
return "D"
print "D"
else:
return "F"
print "F"
print get_letter_grade(get_avergare(lloyd))
def get_class_average(students):
results = []
for student in students:
results.append(get_average(students))
return average(results)

(Oops, try again. get_class_average([alice]) resulted in an error: list indices must be integers, not str)

Hi
I have now looked at all discussions within this chapter and i really can't find my error.

I hope some of you guys can help thanks :slight_smile:


#5

You need proper indentation

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

#7

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