# Part of the whole -

#1

11. Student Becomes the Teacher - Part of the Whole

I am getting the below error but am not sure what I have wrong. I think its something to do with the way it reads the list but I can not work out how to correct it.

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

``````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 = 0.1 * average(student['homework'])
quizzes = 0.3 * average(student['quizzes'])
tests = 0.6 * average(student['tests'])
overall = homework + quizzes + tests

return overall

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

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

#2

It's saying you're doing something like:

``[1, 2, 3]['kebab']``

``````\$ python2 -i ao.py
C
>>> get_class_average([alice])
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "ao.py", line 51, in get_class_average
results.append(get_average(students))
File "ao.py", line 27, in get_average
homework = 0.1 * average(student['homework'])
TypeError: list indices must be integers, not str
>>> import pdb
>>> pdb.pm()
> /tmp/derp/ao.py(27)get_average()
-> homework = 0.1 * average(student['homework'])
(Pdb) print student
[{'quizzes': [82.0, 83.0, 91.0], 'tests': [89.0, 97.0], 'name': 'Alice', 'homework': [100.0, 92.0, 98.0, 1
00.0]}]``````

#3

you wrote
for student and are now trying to pass students

#4

Thank you both, after some sleep I managed to correct it with your help.

#5

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