0

Hi,
I have this

def update_labelain0_val(self):
        val=get_ain0()
        self.labelain0_val.set(val)
        self.labelain0.config(bg="#32CD32")
        #0-12.9v -> 0-6000N
        valain0=float(val)
        valain0_calc=valain0*6000/12.9
        valain0_calc=int(valain0_calc)
        self.labelain0_calc.set(valain0_calc)
        self.labelain0calc.config(bg="#FF8C00")

        threading.Timer(0.1, self.update_labelain0_val).start()
        return

This is part of a class which update a label in a window. It is working fine. My problem is :
how can i give a variable name o this thread and have a function that stop the thread before close the window.

Thank you

3
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3 Years
Discussion Span
Last Post by Gribouillis
0

You could collect the threads in some container and iterate through it and close each thread when you close the window.

0

If i don t ask too much can you point me to an example for this?
Thanks

0

I would tend to use a Condition object and a wait() with timeout instead of a timer. Here is an example

#!/usr/bin/env python
# -*-coding: utf8-*-
from __future__ import (absolute_import, division,
                        print_function, unicode_literals)

__doc__ = '''
'''
import threading

def hello_world():
    print('hello world')

class PeriodicCall(object):
    def __init__(self, seconds, func, *args, **kwd):
        self._thread = threading.Thread(target = self._periodic_call,
            args = (float(seconds), func, args, kwd))
        self._cond = threading.Condition()
        self._interrupted = False

    def start(self):
        self._interrupted = False
        self._thread.start()

    def _periodic_call(self, seconds, func, args, kwd):
        with self._cond:
            while True:
                if self._interrupted:
                    break
                self._cond.wait(seconds)
                if not self._interrupted:
                    func(*args, **kwd)

    def cancel(self):
        with self._cond:
            self._interrupted = True
            self._cond.notify()
        self._thread.join()

if __name__ == '__main__':
    p = PeriodicCall(0.8, hello_world)
    import time
    p.start()
    for i in range(5):
        time.sleep(0.377689)
        print('main')
    p.cancel()
    print('canceled')
    time.sleep(2)
    print('bye')

Edited by Gribouillis

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