PySide6 segmentation fault on Ubuntu 18.04 (Relink issue)

Question

This script is from the Qt for Python page:

import sys

from PySide6.QtCore import Qt

from PySide6.QtWidgets import QApplication, QLabel

                                                     

if __name__ == "__main__":

    app = QApplication(sys.argv)

    label = QLabel("Hello World", alignment=Qt.AlignCenter)

    label.show()

    sys.exit(app.exec_())

But I keep getting this error:

python3: Relink `/lib/x86_64-linux-gnu/libsystemd.so.0' with `/lib/x86_64-linux-gnu/librt.so.1' for IFUNC symbol `clock_gettime'
python3: Relink `/lib/x86_64-linux-gnu/libudev.so.1' with `/lib/x86_64-linux-gnu/librt.so.1' for IFUNC symbol `clock_gettime'
Segmentation fault (core dumped)

I installed PySide with pip3 install pyside6, my python version is 3.6.9, my ubuntu version is 18.04.

Answer 1

Have you tried installing it in a virtual environment? Maybe the system-wide installation make some pre-existing libraries interfere.

Choose the folder where you want to install your virtual environment

user@pc:~/$ python3 -m venv /path/to/new/virtual/virtualenvironment/my_venv

Activate the new virtual env:

user@pc:~/$ source /path/to/new/virtual/environment/bin/activate

Install (locally) PySide6:

(my_venv) user@pc:~/$ pip3 install pyside6

Run the script from the virtual environment:

(my_venv) user@pc:~/$ python3 my_qt_script.py