How to close a thread in python

How to close a thread in python: first import threading and define a method; then define the thread, target points to the method to be executed, start it; finally stop the thread, the code is [stop_thread(myThread)].

The operating environment of this tutorial: Windows 7 system, python version 3.9, DELL G3 computer.

How to close threads in Python:

1. Start threads

First import threading

import threading

Then define a method

    def serial_read():
   ...
   ...

Then define the thread, the target points to the method to be executed

myThread = threading.Thread(target=serial_read)

Start it

myThread.start()

2. Stop the thread

Not much to say, just go to the code

import inspect
import ctypes
def _async_raise(tid, exctype):
    """raises the exception, performs cleanup if needed"""
    tid = ctypes.c_long(tid)
    if not inspect.isclass(exctype):
        exctype = type(exctype)
    res = ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, ctypes.py_object(exctype))
    if res == 0:
        raise ValueError("invalid thread id")
    elif res != 1:
        # """if it returns a number greater than one, you're in trouble,
        # and you should call it again with exc=NULL to revert the effect"""
        ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, None)
        raise SystemError("PyThreadState_SetAsyncExc failed")
def stop_thread(thread):
    _async_raise(thread.ident, SystemExit)

Stop the thread

stop_thread(myThread)

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