[SOLVED] Executing python script built under different virtual environment/venv?

Executing python script built under different virtual environment/venv?

I apologize if what I'm trying to achieve is not Pythonic - I recently moved to the language.

I have a project directory structured like so:

root
--proj1
----venv
----main.py
--proj2
----venv
----main.py

Both proj1 and proj2 run under their own virtual environments. I am trying to call proj2/main.py from proj1/main.py, whilst executing proj2/main.py under its own venv. I have tried:

import subprocess

s2_out = subprocess.check_output([sys.executable, r"..\proj2\__main__.py", "arg"])

This invokes successfully, but I am getting all manner of not found exceptions, etc. I am guessing this is the reason why.

Please let me know if there is a better approach!

Solution

You can do this:

import subprocess
subprocess.call(["python_interpreter location (python.exe)", "python file"])

So you could do:

import subprocess
subprocess.call(["../proj2/bin/python.exe", "proj2/main.py"])

For Mac OS and Linux, the python interpreter path for a venv would be folder/bin/python.exe, or in your case ../proj2/bin/python.exe.

For Windows, the python interpreter path for a venv would be folder/scripts/python.exe.

You may need to include the full paths.

Another way to do this could be using subprocess.call, if you need the output:

import subprocess

output = subprocess.call("%s %s" %("../proj2/bin/python.exe", "proj2/main.py"))
print(output)

Both ways will work just fine :)