How to call the return value of a function?

Question

Python

Goodnight.
Please tell me the reason for the error: "NameError: name 'firstarray' is not defined"
There are such functions:

def getsomething1():
    ...
    return firstarray

def getsomething2():
    ....
    return secondarray

def getsomething3(firstarray, secondarray):
    xlist = []
    for i in firstarray:
        i *= secondarray[0]
        x = sin(i)
        xlist.append(x)
    print(xlist)



getsomething1()
getsomething2()
getsomething3(firstarray, secondarray)

Answer 1

you return to void:

firstarray = getsomething1()
secondarray = getsomething2()
getsomething3(firstarray, secondarray)

or
getsomething3(getsomething1(), getsomething2())

Answer 2

firstarray in the first function must be declared explicitly, at least in the body, optionally in the parameter