See here https://stackoverflow.com/questions/1420957/stopping-embedded-python.

We currently do not expose Py_AddPendingCall, though, but assuming we did (there is PR #692 that uses it), you could probably translate the given example like this:

class Interrupter
{
    public Interrupter()
    {
        _interruptAction = DoInterrupt;
    }

    int DoInterrupt(IntPtr arg)
    {
        Exceptions.SetError(Exceptions.KeyboardInterrupt, "interrupted");
    }

    [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
    delegate int PendingCall(IntPtr arg);
    readonly PendingCall _interruptAction;

    void Interrupt()
    {
        IntPtr func = Marshal.GetFunctionPointerForDelegate(_interruptAction);
        Runtime.Py_AddPendingCall(func, IntPtr.Zero);
    }
}

All Runtime functions are internal, so you will have to work within pythonnet's codebase itself. A PR adding an Interrupt() function on PythonEngine and PyScope would be highly appreciated :)

Many thanks, i'll do that.

Hi, unfortunately I can't get this to work. I basically used the Interrupter class you posted above, but the DoInterrupt() callback never gets invoked.

Any ideas?

Hi filmor, apologies, got it working. Had to change my C# host apps threading model. As a COM/DCOM MTA server the .exe primary thread was not the thread which eventually called PyEval_InitThreads, which is required for the Py_AddPendingCall supplied callback to work.

Thanks again.

Nice, I'll see whether I can prepare a PR that includes this.

@jduncalf I think this extension should be help https://github.com/amos402/py-xtimeout

anyone would like to submit a PR?

I think this is not a problem that relate to pythonnet, the extension I supplied above can handle this case.
Or you can reference here to make a trace callback when you try to interrupt the work thread.
https://github.com/amos402/py-xtimeout/blob/3f17f5ed050045cd8dc13987ce2abb0187501f88/xtimeout/_xtimeout.cpp#L358-L379
https://github.com/amos402/py-xtimeout/blob/3f17f5ed050045cd8dc13987ce2abb0187501f88/xtimeout/_xtimeout.cpp#L86-L95

@heartacker i have the same requirement of stopping runing code embbed in wpf. if there is any easy way to stop them. tell me thanks

I also meet this situation. Is there any idea to stop running script which embedded in C#?
thanks

I also meet this situation. Is there any idea to stop running script which embedded in C#?
thanks

it seems we have to wait for 3.0.0