CODEWITHSUNDEEP
pythonpython-3.xpython-2.7pyside2
mm_
mm_

Reputation: 1735

PySide2 not closing correctly with basic example

When I run the basic script:

import sys
from PySide2.QtWidgets import QApplication, QLabel

app = QApplication(sys.argv)
label = QLabel("Hello World")
label.show()
app.exec_()

forthe first time it all works fine. However, if I run it a second time I get:

File "../script.py", line 17, in <module>
app = QApplication(sys.argv)

RuntimeError: Please destroy the QApplication singleton before creating a new QApplication instance.

I am running the scripts in an Ubuntu machine. I get the same error in python2 and python3.

Thanks !

Upvotes: 8

Views: 2069

Answers (1)

eyllanesc
eyllanesc

Reputation: 243965

Probably your IDE has already created a QApplication, so the solution is to create a QApplication if it does not exist:

app = QApplication.instance()
if app is None: 
    app = QApplication(sys.argv)

Upvotes: 11

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