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_() for

Solution 1:

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)