pyQt and threading application crash
<p>I wrote simple program which has pyQt interface with 2 buttons (start and cancel). Start button runs some calculations in the background (by starting update function) and thanks to threading I can still use UI.
But the application crashes after 10sec - 2 minutes. UI just dissapears, program shutdown.</p>

<p>when I use pythonw to run app without console thread crashes after ~25 sec but gui still works.</p>

<pre><code>#!/usr/bin/python
import threading
import sys
from PyQt4 import QtGui, QtCore
import time
import os


class Class(QtGui.QWidget):

    def __init__(self):
        #Some init variables
        self.initUI()

    def initUI(self):
        #some UI
        self.show()

    def update(self,stop_event):
            while True and not stop_event.isSet():
                self.updateSpeed()
                self.updateDistance()
                self.printLogs()
                self.saveCSV()
                self.guiUpdate()
                time.sleep(1)

    #gui button function
    def initiate(self):
        self.stop_event = threading.Event()
        self.c_thread = threading.Thread(target = self.update, args=(self.stop_event,))
        self.c_thread.start()

    #Also gui button function
    def cancelTracking(self):
        self.stop_event.set()
        self.close()

def main():

    app = QtGui.QApplication(sys.argv)
    ex = Class()
    sys.exit(app.exec_())
    ex.update()

if __name__ == '__main__':
    main()
</code></pre>

<p>I dont know if I'm doing threading right. I found example like this on stack. I'm quite new to python and I'm using threading for the first time.</p>