How is Everybody Doing?


#1



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


It is overall correct and same as the model code. However I do not understand under the function get_letter_grade(score):, since score has never been defined. It is neither a global nor local variable so why does it work?
Any answers would be helpful, thanks!


Replace this line with your code. 
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(sum(numbers)) / float(len(numbers))
    return total

def get_average(student):
    homework = average(student["homework"])* 0.1
    quizzes = average(student["quizzes"])* 0.3
    tests = average(student["tests"])* 0.6

    avrg = homework + quizzes + tests
    return avrg
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(lloyd)        
students = [lloyd, alice, tyler]            
def get_class_average(students):
    results = []
    for student in students:
        get_average(student)
        total = get_average(student)
        results.append(total)
    return average(results)
print get_class_average(students)    
print get_letter_grade(students)    
print get_letter_grade(get_class_average(students))


#2

function parameters don't have to be defined, they serve as placeholder until you supply a value when calling the function


#3

Alright but isnt lloyd a dictionary with keys and their mapped values? Why in this case is the function treating it like a single integer?


#4

because you have get_average to calculate the average of the lloyd dictionary, then get_letter_grade only tasks is to convert this integer (calculated by get_average) into a letter grade


#5

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