Make python file into a library file

Question

I have a python file that I want to transform into a library so I can call it in another file through the import subprocess, for files with extension . c the command I know is cc -o nomeficheiro nomeficheiro.c but to do this for python I can not find information how to do. What I have been able to do so far is the following:

nome do ficheiro com este código é libraryteste

     #biblioteca para chamar ficheiros de outra extensão
        from subprocess import check_output
        import time
        import sys
        from statistics import mean

        tam=1
        vec=[]

        def Average(lst):
            return mean(lst)

        def criaVetor(value):
            for i in range(tam):
                vec.append(value)
            return vec

        while True:
            sensor_data= check_output(['./raspandmax','-d'], shell=False).decode()# chama o ficheiro raspandmax.c em modo diferencial
            output_value = (sensor_data)# mostra o valor analgico lido
            adc_value = float(output_value)# converte o valor analógico de string para float
            mean_value = Average(criaVetor(adc_value))
            print("{0:.4f}".format(mean_value))
            time.sleep(5)

The file where I import the previous code is as follows:

o nome do ficheiro deste código é sensor_teste
     import libraryteste
        ##### Data of Magnetic Sensor ######################

the problem I’m having is that when I run the sensor_test file it immediately shows the value you’re reading on the sensor and if I try to store that value in a variable it doesn’t do so.