[PyQt] Python3 PyQt Resources bug

[Algis Kabaila]

On Wed, 29 Jun 2011 02:52:08 AM Phil Thompson wrote:
> On Tue, 28 Jun 2011 21:53:21 +1000, Algis Kabaila <akabaila at pcug.org.au>
> 
> wrote:
> > Hi,
> > 
> > Attempting to move to Python3 turned up a problem with resource
> > compilation
> > and/or installation into program.  In my multi-partition box there are
> 
> two
> 
> > kubuntu 11.04 "natty" os's.  Their names according to the desktop images
> > are
> > "Red Leaves" for Python3
> > "Winter Swans" for Python2
> > The same small script with tiny resource file runs ok on "Winter Swans",
> > but
> > fails to compile resources into the program on "Red Leaves".
> > 
> > Here are the two compilation/running dialogs:
> > 
> > On the Red Leave
> > ================
> > pyhon 3.2
> > sip  4.12.3
> > qt   4.7.2
> > pyqt 4.8.4
> > 
> > 
> > menu.qrc
> > --------
> > <!DOCTYPE RCC><RCC version="1.0">
> > <qresource>
> > <file alias="hi.png">icons/address-book-new.png</file>
> > <file alias="quit.png">icons/no.png</file>
> > </qresource>
> > </RCC>
> > 
> > compiling
> > ---------
> > ak at supremo:/dat/work/py2/menubar$ pyrcc4 menu.qrc -o qrc_menu.py
> > ak at supremo:/dat/work/py2/menubar$ python3 menu_r.py
> > 
> > Traceback (most recent call last):
> >   File "menu_r.py", line 7, in <module>
> >   
> >     import qrc_menu
> >   
> >   File "/dat/work/py2/menubar/qrc_menu.py", line 269, in <module>
> >   
> >     qInitResources()
> >   
> >   File "/dat/work/py2/menubar/qrc_menu.py", line 264, in qInitResources
> >   
> >     QtCore.qRegisterResourceData(0x01, qt_resource_struct,
> >     qt_resource_name,
> > 
> > qt_resource_data)
> > TypeError: qRegisterResourceData(int, str, str, str): argument 2 has
> > unexpected type 'str'
> > ak at supremo:
> > 
> > On the "Winter Swans"
> > =====================
> > OS ubuntu 10.10 upgraded to 11.04 "natty"
> > python 2.7.1+
> > pyqt  4.8.3
> > qt    4.7.2
> > 
> > ak at supremo:/dat/work/py2/menubar$ pyrcc4 menu.qrc -o qrc_menu.py
> > ak at supremo:/dat/work/py2/menubar$ python2.7 menu_r.py
> > QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed: No
> > such
> > file or directory
> > QFileSystemWatcher: failed to add paths: /home/ak/.config/ibus/bus
> > ak at supremo:/dat/work/py2/menubar$
> > 
> > The gui works ok.
> > 
> > The script is listed below
> > 
> > ****************
> > *#!/usr/bin/python3
> > # menu_r.py - menu bar with resources.
> > 
> > import sys
> > from PyQt4 import QtGui
> > 
> > import qrc_menu
> > 
> > class MainWindow(QtGui.QMainWindow):
> > 
> > #    def __init__(self):
> >     def __init__(self, parent=None):
> >         super(MainWindow, self).__init__(parent)
> > 
> > #        QtGui.QMainWindow.__init__(self)
> > 
> >         self.resize(300,200)
> >         self.setWindowTitle('Menu and tool bar.')
> >         exit = QtGui.QAction(QtGui.QIcon(':/quit.png'),'Exit', self)
> >         exit.setShortcut('Ctrl+Q')
> >         exit.setStatusTip('Exit application')
> > 
> > #
> > self.connect(exit,QtCore.SIGNAL('triggered()'),QtCore.SLOT('close()'))
> > 
> >         exit.triggered.connect(self.close)
> >         toolBar = self.addToolBar('tools')
> >         toolBar.addAction(exit)
> >         self.centralwidget = QtGui.QWidget(self)
> >         self.gridLayout = QtGui.QGridLayout(self.centralwidget)
> >         self.plainTextEdit = QtGui.QPlainTextEdit(self.centralwidget)
> >         self.gridLayout.addWidget(self.plainTextEdit, 0, 0, 1, 1)
> >         MainWindow.setCentralWidget(self, self.centralwidget)
> >         self.statusBar()
> >         menubar = self.menuBar()
> >         file = menubar.addMenu('&File')
> >         file.addAction(exit)
> >         
> >         sayHiAction = QtGui.QAction(QtGui.QIcon(':/hi.png'), 'Greet
> >         them!',
> > 
> > self)
> > 
> >         sayHiAction.setStatusTip('Say Hi')
> >         toolBar.addAction(sayHiAction)
> >         file.addAction(sayHiAction)
> >         sayHiAction.triggered.connect(self.sayHi)
> >     
> >     def sayHi(self):
> >         self.plainTextEdit.setPlainText('Hi Pete, hi world!')
> >         # setPlainText(text) clears the plainTextEdit window and puts
> >         fresh
> > 
> > text.
> > 
> >         self.plainTextEdit.appendPlainText('Peace to all people of good
> > 
> > will!')
> > 
> > app = QtGui.QApplication(sys.argv)
> > main = MainWindow()
> > main.show()
> > sys.exit(app.exec_())
> > *************
> > The PyQt compiled with python3.2 works fine, other than the problem with
> > 
> > resources. My knee jerk reaction is that the error is likely to be in
> 
> the
> 
> > script pyrcc4, though that is only a guess.
> > 
> > I would greatly appreciate any and all advice.  There is no burning
> > urgency
> > for me, because it is quite possible to test the scripts with reading
> 
> the
> 
> > icon
> > files directly, as was done in the original listing.  However, this is
> > *not
> > really* satisfactory as moving the directory with all files to a
> 
> different
> 
> > location does cause problems "vanishing icons".
> 
> Make sure you are passing the right flags to pyrcc4...
> 
> http://www.riverbankcomputing.com/static/Docs/PyQt4/html/resources.html#pyr
> cc4
> 
> Phil

That's kind of funny - I started a few weeks ago with 
pyrcc4 -py3 <etc..> 
a few weeks ago and all worked fine.  Then I started doing more serious work 
and dropped the - py3... (well, my memory has become "short term" - the -py3 
flag is even marked in my notes...).  The "bug" appeared and left me wondering 
how did I manage to get the earlier examples working (no fool like an old 
fool).  Sorry for the noise and a big *THANK YOU* for your tolerance and your 
magnificent work!

OldAl.