[PyQt] PyQt4.Gui.QFileDialog

[Hans-Peter Jansen]

On Monday 31 October 2011, 08:07:00 Janwillem wrote:
> I want a small script with just a few filedialogs not a full blown
> gui application . However when I try the code below the dialog does
> not disappear after clicking the Open button on the dialog  but stays
> on top until the script exits. What am I doing wrong??
> Thanks, Janwillem
>
> def open_files(default_dir=None):
>     """Returns list of filenames optionally given a default dir"""
>     from sys import argv
>     from os import environ
>     from PyQt4.QtGui import QApplication, QFileDialog,QWidget
>     if default_dir == None:
>         default_dir = environ['HOME']
>     app = QApplication(argv)
>     fdialog = QFileDialog
>     filenames = fdialog.getOpenFileNames(directory=default_dir)
>     app.exit()
>     return list(filenames)
>
> if __name__ == '__main__':
>     from PyQt4.QtCore import QT_VERSION_STR
>     from platform import python_version
>     print('Python %s' % (python_version()))
>     print('PyQt4 %s' %QT_VERSION_STR)
>     print('open dialog')
>     lst = open_files()
>     print('dialog finished')
>     for fname in lst:
>         print(fname)
>     import time
>     time.sleep(2)
>     print 'finished'

Without taking a deeper look, you might want to try instancing/exiting 
QApplication just once per process.

Also time.sleep is a (non pyqtonic) blocking function. Use a 
QTimer.singleShot for this purpose, which would allow you to let the 
event loop run in the meantime.

Pete