Cannot stop rust program while running python code

[ktjd123]

Bug Description

When I run python code in fast loop from rust and want to stop the program, python takes interrupt so rust program won't exit.

Steps to Reproduce

Run python code in Rust

Backtrace

No response

Your operating system and version

tested in mac, linux

Your Python version (python --version)

Python 3.11.3

Your Rust version (rustc --version)

rustc 1.70.0 (90c541806 2023-05-31)

Your PyO3 version

0.19.0

How did you install python? Did you use a virtualenv?

mac with brew

and apt for linux

Additional Info

Thank you.

[adamreichold]

Could you share some code showing what exactly you are doing?

For example, doesn't Python raise an exception when the signal is received? Where is that exception handled?

[ktjd123]

Sorry for few information.

I think the CTRL-C is captured at python side, and thought That shouldn't happen since It's blocking input to main process, But I'll investigate more and re-open issue.

Thank you for reply

[birkenfeld]

You can disable Python's SIGINT handler with

signal.signal(signal.SIGINT, signal.SIG_DFL)

[ktjd123]

@birkenfeld Thank you for your kind help :)

[Jgfrausing]

To do it from Rust:

        Python::with_gil(|py| {
            py.run(
                r#"
import signal
print("[python] Ignoring system signals")
signal.signal(signal.SIGINT, signal.SIG_DFL)
              "#,
              None,
              None,
          )
          .unwrap();
      });