9. How is Everybody Doing?


#1

why is my class letter grade A instead of B when the class average is 83.866667?

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) 
    result = total / len (numbers)
    return result 
    
def get_average(student): 
    homework = average (student ["homework"]) 
    quizzes = average (student ["quizzes"])
    tests = average (student ["tests"]) 
    sum = .1 * homework + .3 * quizzes + .6 * tests
    return sum 
    
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(students): 
    results = []
    for student in students: 
        results.append (get_average (student)) 
    return average (results) 

students = [lloyd, alice, tyler] 
print get_class_average (students) 
print get_letter_grade (students)

#3

get_letter_grade is not designed to handle a list of students.

get_letter_grade expects a number, and converts this to a letter_grade for you. So if you have a list of students, first calculate the class average, then pass the class average as argument when calling get_letter_grade


#5

Don't wory I figured it out :
print get_class_average([lloyd, alice, tyler])
print get_letter_grade


#6

here:

print get_letter_grade (students)

get_letter_grade is called with students as argument. However, your get_letter_grade function is designed to convert a number grade to a letter grade, so it expects a number as argument, not a students list

So we need to get from students list to average grade of this students, for this we can use get_class_average

if you have still have a question, make a new topic.


#7

got it, thanks for your help!


#8