How in the thread to wait for the completion of the function called by the signal, and get the value from this function?

Question

Python

I emit a signal in the stream

self.signal_deer_2fa.emit()
tfa_code = ... (из функции сигнала как-то)

then in this thread you need to continue working with this variable tfa_code

function, which is called when a signal is emitted:

def signal_deer_2fa_f(self):
        tfa = QtWidgets.QInputDialog.getText(self, 'Ввод 2фа.', 'Введите 2фа код:')
        return tfa # или без него

How can I wait on the thread until the user does something with the dialog box, and then get what he entered?

Answer 1

the signal is emitted in the thread
the function bound to this signal is called
I need to wait in the thread until this function is executed and get the value from it

As soon as a signal is emitted, it enters the signal queue and will be processed as soon as possible.
QThread is a wrapper for threads that runs in QApplication, so it makes no sense to bind it with a slot.
Everything depends very much on the structure of the program
. There are several ways. Of the simple ones:
1. moveToThread(targetThread)
Create a QThread thread, empty, run it. We take a class and call the moveToThread method, all slots
of this class will be executed in thread
2. Queues
We create a queue (for example, queue.Queue), the thread continuously listens to the queue, when a task occurs there, picks it up and executes it.
Task - anything, the main thing is that the code knows what to do with it