Output is returned correctly but still not passing


#1

The output is exactly "80.55
79.9
91.15
None
None
"
and the error is "get_class_average([alice]) should return a number".
I simply don't understand why I am getting the error. Any helpful explanation will be appreciated.


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_class_average(students):
    results = []
    students = [lloyd, tyler, alice]
    for student in students:
        yes = get_average(student)
        print yes
    
student_list = [lloyd, alice, tyler]    
print get_class_average(student_list)


#4

@chevydogincode

the FUNCTION talk

def myFunc( param1, param2):
    # Begin of =myFunc= FUNCTION-BODY
    # this =myFunc= function- has 2 PARAMETERS param1 and param2
    # param1 and param2 PARAMETERS are used 
    # as -local- VARIABLES throughout the =myFunc= FUNCTION-BODY
    print( param1 + " and " + param2 )
    #End of =myFunc= FUNCTION-BODY

If you want to call/execute the myFunc function
you will have to add a pair of parentheses to myFunc
like
myFunc()
As the myFunc function was defined
as having 2 parameters
you have to provide 2 arguments
in our case 2 string VALUES "Alena" and "Lauren"
like
myFunc("Alena","Lauren")

some quotes from the outer-world:

**argument is the value/variable/reference being passed in,
parameter is the receiving variable used within the function/block**

OR

**"parameters" are called "formal parameters",
while "arguments" are called "actual parameters".**

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++++ function with 1 parameter using return-statement

def myFunction( param1 ):
    # //Begin of =myFunction= FUNCTION-BODY
    # //=myFunction= function has 1 PARAMETER param1
    # //this param1 PARAMETER is used as a -local- VARIABLE
    # //throughout the =myFunction= FUNCTION-BODY
    return param1;
    # //End of FUNCTION-BODY

You have defined a myFunction function
which takes 1 parameter param1
this param1 parameter is used
as a variable throughout the =myFunction= FUNCTION-BODY.

If you want to call/execute this myFunction function
and this myFunction function was defined
as having 1 parameter param1
you will have to provide 1 argument
in our case a "number VALUE" 4
myFunction( 4 )

some quotes from the outer-world:

**argument is the value/variable/reference being passed in,
parameter is the receiving variable used within the function/block**

OR

**"parameters" are called "formal parameters",
while "arguments" are called "actual parameters".**

============================================

As you are using the return-statement in your myFunction function
you will only get a return-value no-display.
You can however capture this return-value in a variable
and then use the print-method to do a display.

theResult = myFunction( 4 )
print theResult

OR directly

print myFunction( 4 )

#5

@chevydogincode,

You have problem with your logic in your get_class_average() function.

def get_class_average(students):
    # get_class_average() function takes 1 PARAMETER =students=
    # this =students= PARAMETER is used as a =local= VARIABLE
    #
    # initialze an empty =list=
    results = []
    # here your 1st problem
    # as you re-assign the =local= VARIABLE
    # therewith overwriting the ARGUMENT used as you =call= the function
    students = [lloyd, tyler, alice]
    for student in students:
        # you want to determine the =average= of every =student=
        # and then =append= the result to the pre-initialized =results= list using
        # results.append( get_average(student) )
        yes = get_average(student)
    # you will want to =return=
    # the =average= of all the values in the =students= list
    # return average(results)
    print yes