Oops, try again. One of the following is missing or broken when we tried to use it: alice, lloyd, tyler, students, get_class_average, get_letter_grade


#1



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


I am not able to find the mistake or understand the error.


The error message says this:Oops, try again. One of the following is missing or broken when we tried to use it: alice, lloyd, tyler, students, get_class_average, get_letter_grade


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]
}

student=[lloyd,alice,tyler]

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

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

print get_letter_grade(get_average(lloyd))

def get_class_average(student):
    result=[]
    for students in student:
        a=get_average(students)
        result.append(a)
    return average(result)
print result
print get_class_average(student)
x=get_class_average(student)
print get_letter_grade(x)


#2

Problem solved :Changing the list name from student to students did the trick.Probably its a key word that they look for.Though i still didnt understand what the error meant.


#3

This is the keys bits for you from the error (my bold):

One of the following is missing or broken when we tried to use it: alice, lloyd, tyler, students, get_class_average, get_letter_grade

As you say, they are looking for students but had it named student. So the error is trying to say that students was missing (as it couldn't find a students variable), only the error isn't tailored to your exact problem rather it is a catch all for any of the things it says going wrong.


#4

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