[PyQt] newly introduced bug in PyQt 4.8.1 uic.loadUi

[Phil Thompson]

On Sun, 5 Dec 2010 17:24:06 -0800, "Paul Du Bois" <dubois at doublefine.com>
wrote:
> This change to PyQt4/uic/Loader/loader.py loadUi() breaks support for
> file-like objects,
> but uic.loadUi() is still documented as supporting them:
> 
>         # Allow the filename to be a QString.
>         filename = str(filename)
> 
>         return self.parse(filename, os.path.dirname(filename))
> 
> The use case for file-like objects is wrapping up apps via py2exe or
> similar.
> 
> Here is an example of the problem:
> 
>>>> from PyQt4 import uic
>>>> help(uic.loadUi)
> Help on function loadUi in module PyQt4.uic:
> 
> loadUi(uifile, baseinstance=None)
>     loadUi(uifile, baseinstance=None) -> widget
> 
>     Load a Qt Designer .ui file and return an instance of the user
> interface.
> 
>     uifile is a file name or file-like object containing the .ui file.
>     baseinstance is an optional instance of the Qt base class.  If
> specified
>     then the user interface is created in it.  Otherwise a new instance
> of the
>     base class is automatically created.
> 
>>>> import StringIO
>>>> f = StringIO.StringIO("foo")
>>>> uic.loadUi(f)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "C:\python26\lib\site-packages\PyQt4\uic\__init__.py", line 185,
> in loadUi
>     return DynamicUILoader().loadUi(uifile, baseinstance)
>   File "C:\python26\lib\site-packages\PyQt4\uic\Loader\loader.py", line
> 31, in loadUi
>     return self.parse(filename, os.path.dirname(filename))
>   File "C:\python26\lib\site-packages\PyQt4\uic\uiparser.py", line 817,
> in parse
>     document = parse(filename)
>   File "C:\python26\lib\xml\etree\ElementTree.py", line 862, in parse
>     tree.parse(source, parser)
>   File "C:\python26\lib\xml\etree\ElementTree.py", line 579, in parse
>     source = open(source, "rb")
> IOError: [Errno 22] invalid mode ('rb') or filename: '<StringIO.StringIO
> instance at 0x00C87A08>'

Should be fixed in tonight's snapshot.

Thanks,
Phil