[PySide] PyInstaller Main Window Duplicating Infinitely (Win 10)

[Israel Brewster]

> On Sep 4, 2019, at 1:52 PM, paul basinger <paulcb213 at gmail.com> wrote:
> 
> Hello,
> 
> After making an exe from pyinstaller, the code below causes the main window to duplicate repeatedly. I haven't tried it with QProcess yet but I started looking into it. Anyone know python's multi-processes equivalent in PySide2/QT. It runs fine when run normally with python (3.7). 
> 
> Thanks,
> 
> Software Engineer
> Paul Basinger
> paulcb213 at gmail.com <mailto:paulcb213 at gmail.com>  

Try adding, at the very beginning (before you do any PySide2 imports):

from multiprocessing import freeze_support

I want to say that’s what fixed this for me. It’s fine to import this even when not frozen, but it should fix things when using pyinstaller.
---
Israel Brewster
Software Engineer
Alaska Volcano Observatory 
Geophysical Institute - UAF 
2156 Koyukuk Drive 
Fairbanks AK 99775-7320
Work: 907-474-5172
cell:  907-328-9145

> 
> import sys
> import threading
> import random
> from PySide2.QtWidgets import QApplication, QLabel
> from PySide2.QtCore import QThread
> from multiprocessing import Process, Queue, Manager
> 
> def hello(q):
>     q.put(1)
> 
> class AppThread(QThread):
>     def __init__(self, parent):
>         super(AppThread, self).__init__(parent)
> 
>     def run(self):
>         self.loadApp()
> 
>     def loadApp(self):
>         q = Queue()
>         p = Process(target=hello, args=(q,))
>         p.start()
>         q.get(timeout=1)
>         p.join()
> 
> if __name__ == "__main__":
>     app = QApplication(sys.argv)
>     label = QLabel("Hello World")
>     label.show()
>     thread = AppThread(app)
>     thread.start()
>     sys.exit(app.exec_())
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