Part of the Whole, results = [] list contain unwanted values?


#1



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


My results list show up as [80.55, 91.14999999999999, 79.9, 91.14999999999999, 91.14999999999999], when it should have only 3 values(right?)

This is my 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]
}

def average(numbers):
    total = sum(numbers)
    total = float(total)
    return total/len(numbers)
    
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"
       
classe = [lloyd, alice, tyler]         
def get_class_average(students):
    results = []   
    for student in students:
        results.append(get_average(student))
    return average(results)
    
print get_class_average(classe)
print results

the function still works, but the results list has those 2 unwanted values, even when not calling the function whatsoever


#2

seems your browser is sending cached data, i get an error with your code:

Traceback (most recent call last):
File "python", line 51, in
NameError: name 'results' is not defined

results has a local variable scope, it only exist in the function

Try refreshing the page


#3

that was silly, it is indeed the case

I had results = [] before the loop at some point and it just kept the values from when I was testing


#4

Not accessible outside of the function.

Unless this is an international language exercise, the correct name is, students.


Consider when asking a question if you are foisting your own experimental code on an unwitting audience who expect your problem to relate to the actual instructions.


#5

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