How to get variable from another Python script (Python 3)

Question

I have 2 Python 3.5 scripts, boot.py and about.py. Boot.py is located in /os, but about.py is located in /os/bin. Boot.py starts about.py with os.system(/path/about.py). The problem is that about.py requires variables that are in boot.py, and i dont want to rewrite them all over again. So i need to start about.py in a way that it can read/use the variables in boot.py. If its unclear, i posted the codes down below.

boot.py:

#Boot.py
import os
import subprocess
import socket
import platform
import multiprocessing
import time
import datetime
from random import randint
#Create functions
def cls():
    os.system('cls' if os.name=='nt' else 'clear')
#Set the variables
prj_name = 'boot.py'
prj_build = 1.01
prj_developer = 'RED'
#Bunch of print() and input() commands below

about.py:

#Somehow get the variables and functions defined in boot.py
print('This project is made by ' + prj_developer)
print('Build: ' + prj_build)
print('Launched by: ' + prj_name)

Oisin · Accepted Answer · 2016-05-07 18:41:52Z

1

Simply import the other file. By doing so the file will be run and the variables defined.

from boot import *
print('This project is made by ' + prj_developer)
print('Build: ' + prj_build)
print('Launched by: ' + prj_name)

I would also recommend putting all code of the other file, that shouldn't run when imported in a if statement (not necessary in this case though):

if __name__ == "__main__":
    pass # only run if file is executed directly (not from importing)

If the boot.py file is the directory above you would write (add a . for every parent directory):

from .. import boot.*

If the boot.py file is the directory above you would write (make sure to put a empty file called __init__.py in any subdirectories you are importing from):

from DIRECTORY.boot import *

edited May 7, 2016 at 18:41

answered May 7, 2016 at 18:29

Oisin

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8 Comments

HackerGamerLV Over a year ago

But the about.py and boot.py are located in different directories.

Oisin Over a year ago

Then you need to use relative imports. see stackoverflow.com/questions/72852/…

Oisin Over a year ago

See stackoverflow.com/questions/72852/… or docs.python.org/3/reference/import.html

HackerGamerLV Over a year ago

I didn't understand how do i apply it in my code :(

HackerGamerLV Over a year ago

I cant put all the files together, in fact, im making a OS emulator, in which boot.py calls about.py using os.system(). The about.py and all the other files are located in a subdirectory /bin.

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