[Solved] Python; calculate the average of three grades for each of a number of students

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You had most of the elements correct in your script, but you need to think more about the order of everything.

Make sure you pass any arguments that are needed to a function. Your getAvg function needed three arguments for it to calculate the average and display it with the student number. Also you forgot to return average.

When calculating the avg ranges, if you first test for >90, then by definition the next elif avg > 85 will be less than or equal to 90 so it is only necessary to then test for >85.

The following has been rearranged a bit to work:

def getAvg(student, total, numScore):
    average = total / numScore
    print ("The average for student number", student, "is:", average)
    return average

def main():
    student = 0
    more="y"

    while more == 'y':
        student += 1
        total = 0

        numScore = int(input('How many test scores per student: '))

        for test_number in range(numScore):
            print ("The score for test", test_number+1)
            score = int(input(': '))
            total += score

        print ("Student number", student)
        print ('-----------------------------------------')

        avg = getAvg(student, total, numScore)

        if avg > 90:
            print ("You're doing excellent work")
        elif avg > 85:
            print("You are doing pretty good work")
        elif avg > 70:
            print ("You better get busy")
        else:
            print ("You need to get some help")

        print()
        print('Do you want to enter another student test score and get the average score of the student?')
        more = input('Enter y for yes, and n for no: ').lower()

main()

Giving you the following kind of output:

How many test scores per student: 3
The score for test 1
: 93
The score for test 2
: 89
The score for test 3
: 73
Student number 1
-----------------------------------------
The average for student number 1 is: 85.0
You better get busy

Do you want to enter another student test score and get the average score of the student?
Enter y for yes, and n for no: n

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solved Python; calculate the average of three grades for each of a number of students