`concat_vec_envs_v1` prevents Python scripts from exiting

[timf34]

Hi,

When I use concat_vec_envs_v1 when initializing my environment, the Python script will not exit.

Even when I call env.close() at the end of the script, and use sys.exit() or similar, it still will not exit.

Is there anything in particular I need to call to exit the script? Is this known to be an issue?

Thanks Tim

[jjshoots]

Hi @timf34, this may be an artifact from the fact that concat_vec_env uses parallel processing in Python. I think you'd need to perform a SIGINT catch:

from signal import SIGINT, signal

def shutdown_handler(*_):
    print("ctrl-c invoked")
    exit(0)

if __name__ == "__main__":
    signal(SIGINT, shutdown_handler)
    ...

[timf34]

This unfortunately doesn't seem to work

[jjshoots]

@benblack769 Could you perhaps have a look?