How to use functions that are in a different file? - Python

Question

I’m having a problem using functions that are in a different file than where I’m calling these functions. Basically my project is organized as follows:

Lista_I (Pacote Contendo os Arquivos)
    __init__.py
    funcoes_uteis.py
    PDI.py

In the archive PDI.py I have the following code:

import numpy

def aplicar_mascara_media_aritmetica(imagem):

    filtro = numpy.zeros((3, 3))

    for i in range(1, len(imagem) - 1):
        for j in range(1, len(imagem[0]) - 1):
            filtro[0][0] = imagem[i - 1][j - 1]
            filtro[0][1] = imagem[i - 1][j]
            filtro[0][2] = imagem[i - 1][j + 1]
            filtro[1][0] = imagem[i][j - 1]
            filtro[1][1] = imagem[i][j]
            filtro[1][2] = imagem[i][j + 1]
            filtro[2][0] = imagem[i + 1][j - 1]
            filtro[2][1] = imagem[i + 1][j]
            filtro[2][2] = imagem[i + 1][j + 1]

            imagem[i][j] = calcular_media(filtro) #não funciona

    return imagem

And in the archive funcoes_uteis.py i have the function calcular_media(filtro) that is being called into the archive PDI.py. I’ve tried to do import funcoes_uteis but it’s not working. I don’t know if this has anything to do with the python version I’m using, but just in case, I’m using python version 3.6. Can anyone help me with this problem? Thank you in advance!

Answer 1

In the PDI.py add:

import funcoes_uteis

And call:

imagem[i][j] = funcoes_uteis.calcular_media(filtro)

Or if you don’t want to use it as funcoes_uteis.calcular_media call it that:

from funcoes_uteis import calcular_media

And call:

imagem[i][j] = calcular_media(filtro)

---

I created two very simple test scripts

PDI.py

import funcoes_uteis

def aplicar_mascara_media_aritmetica():
    return funcoes_uteis.calcular_media(2)

print(aplicar_mascara_media_aritmetica())

funcoes_uteis.py

def calcular_media(imagem):
    return imagem

And then I executed in cmd: