QThread start() vs Thread start() for Python 3

1. QThread: 同一個QThread可以多次呼叫start(),  但是該QThread在執行中時，額外的呼叫start(), 不會有任何動作。在QThrad執行完後，再次呼叫start(), 會再執行一次。
參：https://www.qtcentre.org/threads/6548-Multiple-start()-on-same-QThread-Object

Hi all,
can I run multiple start() method on same QThread object ?

Simple example follows:

Qt Code:

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int main(int argc, char *argv[]){


        QCoreApplication app(argc,argv);


        threadHandler *TH=new threadHandler();


        TH.start()


        TH.start()


 


        return app.exec();


}

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This code executes the two run() methods as two serial executions.
Is this correct? Do you have experience in this?

Thanks,
Michele

No, only the first call will be effective.
If you call start() a second time while the thread is running, it will do nothing !

http://doc.trolltech.com/4.2/qthread.html#start

Am I correct if I suppose this means that start() can be called several times IF the run() method has returned between the calls?

Re: Multiple start() on same QThread Object

Yes, you can start the thread again when it has already finished.

2. Thread:  同一個Thread只能呼叫start()一次，Thread執行完後，不能再次呼叫start()，否則會有錯。可能的解法是在執行start()前，先建立Thread class object：

process = Thread(target=crawl, args=[urls[ii], result, ii])

• process.start()

參：https://stackoverflow.com/questions/4122188/how-can-i-invoke-a-thread-multiple-times-in-python

you should note that you cannot restart a thread once it has finished execution: you have to recreate the thread object for it to be started again.