Importing a variable from one python script to another

Question

I have script1.py which calls script2.py (subprocess.call([sys.executable, "script2.py"]). But script2.py needs variable x that is known in script1.py. I tried a very simple import x from script1, but it seems not to work.

Is that the right approach to use? For example:

#script1.py import subprocess, sys ##subprocess.call([sys.executable, 'C:\\...\\Desktop\\script2.py'], shell=True) ##os.system("C:\\...\\Desktop\\script2.py") subprocess.Popen("C:\\...\\Desktop\\script2.py", shell=True) print "BLAH" x = BO  #script2.py from script1 import x print "HELLO" print x 

All 3 cases of calling script2 (subprocess.call, os.system, subprocess.Popen ) do not work. I get "BLAH" but not "HELLO".

Answer 1

The correct syntax is:

from script1 import x 

So, literally, "from script1.py import the "x" object."

Answer 2

Try this:

from script1 import x 

I just ran the following pieces of code and it worked

script1:

c = 10

script2:

from script1 import c print c 

The second script printed the integer 10 as you should expect.

Oct 17 Edit: As it stands the code will either not produce the "Hello" as indicated or will go into an infinite loop. A couple of issues:

As it stands, BO is undefined. When you execute script1, the subprocess of script2 is opened. When script2 calls script1, it will print out blah but fail on x=BO as BO is undefined.

So, if you fix that by specifying BO with say a string, it will go into an infinite loop (each script calling the other one and printing x, Hello and Blah).

One potential way to fix it is to pass x through a function call. So, script2 could take x as a function parameter and do whatever you need to do with it.