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]
}

# Add your function below!
def average(numbers):
    total = sum(numbers)
    total = float(total)
    return total / (len(numbers))
    
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
    
def get_letter_grade(score):
    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'
        
print get_letter_grade(get_average(tyler))

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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