Call a function from another file?

Question

Set_up: I have a .py file for each function I need to use in a program.

In this program, I need to call the function from the external files.

I\'ve tried:

Answer 1

Came across the same feature but I had to do the below to make it work.

If you are seeing 'ModuleNotFoundError: No module named', you probably need the dot(.) in front of the filename as below;

from .file import funtion

Answer 2

append a dot(.) in front of a file name if you want to import this file which is in the same directory where you are running your code.

For example, i'm running a file named a.py and i want to import a method named addFun which is written in b.py, and b.py is there in the same directory

from .b import addFun

Answer 3

Any of the above solutions didn't work for me. I got ModuleNotFoundError: No module named whtever error. So my solution was importing like below

from . import filename # without .py  

inside my first file I have defined function fun like below

# file name is firstFile.py
def fun():
  print('this is fun')

inside the second file lets say I want to call the function fun

from . import firstFile

def secondFunc():
   firstFile.fun() # calling `fun` from the first file

secondFunc() # calling the function `secondFunc` 

Answer 4

You can do this in 2 ways. First is just to import the specific function you want from file.py. To do this use

from file import function

Another way is to import the entire file

import file as fl

Then you can call any function inside file.py using

fl.function(a,b)

Answer 5

You should have the file at the same location as that of the Python files you are trying to import. Also 'from file import function' is enough.

Answer 6

You can call the function from a different directory as well, in case you cannot or do not want to have the function in the same directory you are working. You can do this in two ways (perhaps there are more alternatives, but these are the ones that have worked for me).

Alternative 1 Temporarily change your working directory

import os

os.chdir("**Put here the directory where you have the file with your function**")

from file import function

os.chdir("**Put here the directory where you were working**")

Alternative 2 Add the directory where you have your function to sys.path

import sys

sys.path.append("**Put here the directory where you have the file with your function**")

from file import function