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POHow run two different threads simultaneously in pyqt
 

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    <p>I have a situation where i need to start two threads one after the other. I tried the following code snippet, here i could able to start the Thread12 but not able to start Thread2. How can i start both....? How to start 2 threads one ofter the other...?</p> <p><strong>Code snippet</strong></p> <pre><code>class Thread1(QtCore.QThread): Thread1Signal = QtCore.pyqtSignal(str) def __init__(self): super(Thread1, self).__init__() def run(self): print 'Thread1 started' While True: #some statments if Condition: Thread1Signal.emit('Yes') else: Thread1Signal.emit('No') class Thread2(QtCore.QThread): Thread2Signal = QtCore.pyqtSignal(str) def __init__(self): super(Thread2, self).__init__() def run(self): print 'Thread2 started' While True: #some statments if Condition: Thread2Signal.emit('Yes') else: Thread2Signal.emit('No') class MainClass(QtCore.QObject): MainSignal1 = QtCore.pyqtSignal(str) MainSignal2 = QtCore.pyqtSignal(str) def __init__(self): super(MainClass, self).__init__() Threadinstance1 = Thread1() Threadinstance1.Thread1Signal.connect(MainSignal1) Threadinstance2 = Thread2() Threadinstance2.Thread2Signal.connect(MainSignal2) def start(self): Threadinstance1.start() Threadinstance2.start() #Thread2 never starts. def signal1called(s): print s def signal2called(s): print s if __name__=='__main__': app = AtGui.QApplication(sys.argv) temp = MainClass() temp.MainSignal1.connect(signal1called) temp.MainSignal2.connect(signal2called) temp.start() sys.exit(app.exec()_) </code></pre>
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    1. COAre you sure your test case has your threads running long enough for you to see the signals emitted? You are starting your threads before you start the event loop. Are they actually running in loops emitting signals well beyond the event loops starting or might they be finishing too quickly ?
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