Having trouble with How is everyone doing


#1



https://www.codecademy.com/courses/python-beginner-en-qzsCL/1/5?curriculum_id=4f89dab3d788890003000096


Traceback (most recent call last):
  File "python", line 47, in <module>
  File "python", line 45, in get_class_average
  File "python", line 26, in get_average
TypeError: string 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]
}
students = ["lloyd", "alice", "tyler"]
# Add your function below!
def average(numbers):
    total = sum(numbers)
    total = float(total)
    return total/len(numbers)
def get_average(student):
    homework = average(student["homework"])
    quizzes = average(student["quizzes"])
    tests = average(student["tests"])
    return homework*0.1+quizzes*0.3+tests*0.6
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"
get_letter_grade(get_average(lloyd))
def get_class_average(students):
    results = []
    for student in students:
        results.append(get_average(student))
    return average(results)
print get_class_average(students)
print get_letter_grade(get_class_average(students))


I have no idea what I'm doing wrong, I just followed the instructions


#2

your students list contains strings, why?


#3

I thought the students list is a list of the name of the student dictionaries.
so it get_class_average gets each student name, looks at their dictionary, and processes it


#4

■■■■, I'm an idiot, I see my mistake, thanks!


#5

my post was a question disguise as answer, good you solved it, this means you understand it. Good job, well done, be proud of yourself :slight_smile:


#6

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