Launch mayapy.exe with environment variables

Tools Maya
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1

Hi there

For an automated process, I want to launch maya.exe with a script to execute at launch, using

maya.exe -hideConsole -command mel_command

I was thinking about creating a subprocess.Popen command with some env vars, which will itself call maya.exe but it seems pretty hacky, …
Is there a way to pass environment variables to this maya session? I can’t find anything in the doc

Thanks

2

calling subprocess with a specific environment works just fine.
otherwise you can modify the "MAYA.ENV’ file that lives in your “My Documents/Maya” folder to contain the environment variables you want, and those should be inherited by each Maya session.

3

the MayaPyManager (which has not been updated for py3, if that matters) will do this for you

e class="onebox githubgist" data-onebox-src="https://gist.github.com/theodox/2c712a91155c7e1c4c15">
gist.github.com

https://gist.github.com/theodox/2c712a91155c7e1c4c15

mayaPyManager.py
'''
Exposes the MayaPyManager class, which is used to run instances of MayaPy with explict control over paths and environment variables. A Manager can run scripts, modules, or command strings in a separate MayaPy environment; results and errors are captured and returned. 

Typical uses might be:

- running unit tests
- running a copy of Maya.standalone as a headless RPC server with StandaloneRPC https://github.com/theodox/standaloneRPC
- spawning multipe copies of maya to batch process files in parallel on a multi-core machine
- do any of the above on multiple maya versions concurrently
This file has been truncated. show original

4

Thanks for your answers

@Theodox is it possible to use GUI with mayapy? I need to export playblasts.

5

While you can use a standalone GUI library like PyQt/PySide from mayapy, you don’t get access to the normal maya GUI.
For something like playblasts, you’d need to handle that in a normal maya process.

1 Like
6

Got it, thanks!

I’ll do a quick try with render.exe using viewport 2.0, first then test it out using maya.exe with subprocess.Popen