Empty list creation problem


#1

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

This happens to me for the second time. There seems to be a syntax problem when I try to create an empty list.The error message is this:
File "python", line 49
"results" : []
^
SyntaxError: invalid syntax

I tried to syntax it like this: results : []

or this 'results' : []

with spaces or no spaces but nothing works.

I had the same problem in the beginning of the excercise trying to create the list "homework" : [] and after countless tries it finally worked.But I didn't understand exactly how it worked.


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)
    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"
        
print get_letter_grade(lloyd)


def get_class_average(students):
    "results" : []
    for student in students:
        results.append(get_average(student))
    return average(results)

Thanks in advance!


#2

naming variable means you assign value for which you use a equal sign (not a colon)

using quotation marks/apostrophes are strings, not variables


#3

Thank you for the quick response...

You are so right...I think I need some sleep..:joy::joy::joy:


#4

seems like a good plan, naming variable is one of the first lessons


#5

Lol! I like people with humor :smiley:

Thanks again!!!


#6

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