How to call a function based on two functions?

Question

Python

There are several functions. The first one forms the first array, the second one forms the second array. In the third, these arrays are multiplied, a new third array is obtained. And as soon as, in the fourth function, I want to plot the dependence of the first array on the third, problems begin.
The code is schematically like this:

def getarray1():
    #Получаю первый массив
    return array1
 
def getarray2():
    #Получаю второй массив
    return array2
 
def getarray3(array1, array2):
    #Перемножаю элементы первого и второго массивов, 
        #получаю третий массив.
    return array3
 
def buildgraph(array1, array3):
    plt.plot(array1, array3)
 
    plt.xlabel('x')
    plt.ylabel('y')
    plt.title('Title name')
    plt.savefig("test.png")
    plt.show()
 
getarray3(getarray1(), getarray2())
buildgraph(getarray1(), getarray3())

As a result, getarray1 is called twice, and then an error is thrown out that getarray3 requires array1 and array2 parameters. Generally speaking: what is wrong?

Answer 1

You do not understand the elementary principles of procedural programming.
I would advise you to read this fundamental thing: SICP , fortunately, the publication is already available in Russian.
If desired, the PDF version is easily googled.