New subject: [Bug 2258467] PyQt6 and PyQt5 ignore "dir" argument in QFileDialog.getOpenFileName

15 Jan 2024

      https://bugzilla.redhat.com/show_bug.cgi?id=2258467
Bug ID: 2258467
           Summary: PyQt6 and PyQt5 ignore "dir" argument in
                    QFileDialog.getOpenFileName
           Product: Fedora
           Version: 38
          Hardware: x86_64
                OS: Linux
            Status: NEW
         Component: python-pyqt6
          Severity: medium
          Assignee: thunderbirdtr@fedoraproject.org
          Reporter: Michael.Clerx@gmail.com
                CC: epel-packagers-sig@lists.fedoraproject.org,
                    jonathan@almalinux.org,
                    kde-sig@lists.fedoraproject.org, manisandro@gmail.com,
                    thunderbirdtr@fedoraproject.org
  Target Milestone: ---
    Classification: Fedora
Since some time in 2021 (https://bugreports.qt.io/browse/QTBUG-92961,
https://stackoverflow.com/questions/75878424) I've been running into an issue
where QFileDialog.getOpenFileName ignores the "dir" argument (recently renamed
"directory"):
QtWidgets.QFileDialog.getOpenFileName(
        self,
        'Open file',
        '/home/michael/some/path',
    )
This is supposed to create an open file dialog initialised at
"/home/michael/some/path", but at some point (around Fedora 33?) this stopped
working.
The same functionality for getSaveFileName() works as expected.
I've only just noticed that the bug disappears if I install PyQt5 or PyQt6 into
a virtual environment using pip, even when I specify the exact same versions
that DNF installs. So it looks like this is an issue with the packaged version
only. Because it's been present for quite a while now, I can't pinpoint where
it was introduced, but I have seen the same bug on multiple devices, and in
fresh installs of a variety of versions.
A script to reproduce:
#!/usr/bin/env python3
import sys
from PyQt6 import QtWidgets
#from PyQt5 import QtWidgets
# Change this to a valid & accessible path (other than your home)
path = '/home/michael/a/path/that/definitely/exists'
class App(QtWidgets.QMainWindow):
    def __init__(self, path):
        super().__init__()
        self.setWindowTitle('Qt bug test')
        QtWidgets.QFileDialog.getOpenFileName(self, 'Open file', path)[0]
        sys.exit()
if __name__ == '__main__':
    a = QtWidgets.QApplication([])
    a.lastWindowClosed.connect(a.quit)
    app = App(path)
    app.show()
    sys.exit(a.exec())
Reproducible: Always
Steps to Reproduce:
1. Change the `path` variable to an existing path, which you can access, but
which isn't your home directory
2. Run the example code using PyQt5 or PyQt6 installed through DNF
Actual Results:  
An open file dialog appears showing the contents of your home directory
Expected Results:  
An open file dialog appears showing the contents of `path`
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[Bug 2258467] New: PyQt6 and PyQt5 ignore "dir" argument in QFileDialog.getOpenFileName