```
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 (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"
def get_class_average(students):
results = []
for student in students:
results.append(get_average(student))
return average(results)
print get_class_average([lloyd, alice, tyler])
print get_letter_grade(get_class_average([lloyd, alice, tyler]))
```

# Part 9 writes the next error "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" plz help, thanks from ahead

**rkgames**#1

**appylpye**#2

Hi, @rkgames ,

In Exercise 3: Put It Together, you had to write this assignment statement ...

`students = [lloyd, alice, tyler]`

Regardless of whether or not you wrote it then, it is now missing.

After you restore that statement, you can use the `students`

variable in the final two statements, as follows ...

```
print get_class_average(students)
print get_letter_grade(get_class_average(students))
```

I did not write the statement

students = [lloyd, alice, tyler]

As written below, my program returned the expected results. Is this a in the tutorial, or am I missing something. My code reads almost identically to OP, but I got errors regarding number of arguments when I tried to get_glass_average(lloyd, alice, tyler)

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):

#averages a list of numbers

total = sum(numbers) # adds the numbers in the list together

total = float(total) #converts the total to a float

average = total / len(numbers) #divides by the length of the list

return averagedef get_average(student):

#Gives a weighted score based on homework, quizzes, and tests

#Entering the student's name first averages the scores using average(numbers)

#Then it weights those scores`homework = average(student["homework"]) # Runs the averaging fuction on "homework" quizzes = average(student["quizzes"]) #Averages quizzes tests = average(student["tests"]) # Averages tests #return a total score based on weighted averages return (homework * .10) + (quizzes * .30) + (tests * .60)`

def get_letter_grade(score):

#Assigns a letter grade to a 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): #Calculates the class average

results = [] # initializes an empty results list

for student in students: # for each student in the list of students

average_grade = get_average(student) #average their grade

results.append(average_grade) # add their grade to the results list

return average(results) #average the results list, giving class averageprint get_class_average(students) #returns a numerical class average

print get_letter_grade(get_class_average(students)) # return class average letter grade

**appylpye**#5

The `get_class_average`

function header is as follows ...

`def get_class_average(students):`

Since it has one parameter, you must pass it one argument when you call it. For it to execute properly, the argument should be a list of student dictionaries.

This call contains three arguments instead of one, so it raises an error ...

`get_glass_average(lloyd, alice, tyler)`

Instead, add this statement to your program ...

`students = [lloyd, alice, tyler]`

... then you can reliably do this, even if the page has been refreshed to clear memory of variables from previous exercises ...

`print get_class_average(students)`

**system**#6

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