Be able kill Python threads by installing a trace

deaththread.py

import sys
import threading


class DeathThread(threading.Thread):
    
    kill_state = threading.Event()

    def run(self):
        sys.settrace(self.global_trace)
        return super().run()

    def global_trace(self, stack_frame, reason, *args, **kwargs):
        if reason == "call":
            return self.local_trace

    def local_trace(self, stack_frame, reason, *args, **kwargs):
        if self.kill_state.is_set() and reason == "line":
            raise SystemExit()
        return self.local_trace

    def kill(self):
        return self.kill_state.set()