Python PIL and Vista/Windows 7 .. show() not working ...
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From: Esmail on 30 Nov 2009 12:57 Hello all. I am using the PIL 1.1.6 and Python 2.6.x under XP without any problems. However, I can't display any images under Vista or Windows 7. I could understand Windows 7 as it's relatively new, but Vista has been around for a bit. Sample code: import Image im = Image.open('c://mypic.jpg') im.show() this will work fine under XP, but under Windows 7 and Vista the default image viewer will come up with some error message that the image can't be found. I tried with an external image view program and tried to supply it via the command parameter to show - but that too didn't work. Definition: im.show(self, title=None, command=None) Any suggestions/help/workarounds? If you can get this to work with Vista or Windows 7 I'd love to hear from you. Thanks! Esmail
From: Esmail on 30 Nov 2009 13:04 > > im = Image.open('c://mypic.jpg') sorry, slip of the finger, there's only one forward slash or you can use two backward slashes. The problem isn't with opening it (I know it opens fine since I can get its size attribute via im.size) - the show() is the problem. Esmail
From: Lie Ryan on 30 Nov 2009 15:08 On 12/1/2009 5:04 AM, Esmail wrote: >> >> im = Image.open('c://mypic.jpg') > > sorry, slip of the finger, there's only one forward slash > or you can use two backward slashes. > > The problem isn't with opening it (I know it opens fine > since I can get its size attribute via im.size) - the show() > is the problem. What's your default image viewer? im.show is intended to be for debugging purpose and may always guaranteed to work if your image viewer doesn't support receiving the file through <I don't know how PIL passes the image to the program>.
From: Esmail on 30 Nov 2009 15:45 On Nov 30, 3:08 pm, Lie Ryan <lie.1...(a)gmail.com> wrote: > > What's your default image viewer? im.show is intended to be for > debugging purpose and may always guaranteed to work if your image viewer > doesn't support receiving the file through <I don't know how PIL passes > the image to the program>. It's whatever the default windows viewer is :-) .. so if I double- click on the image in the filemanager it fires it up and shows it. This works in XP and Windows 7 and Vista (ie double clicking on the image and having it display). I dug around in the docs and found a named parameter that I can set when I call show. Definition: im.show(self, title=None, command=None) I installed irfanview and specified it/its path in the parameter, but that didn't work either. It's really quite puzzling in the case of Vista since that's been around for quite a few years now. Esmail
From: David Bolen on 30 Nov 2009 16:37
Esmail <ebonak(a)gmail.com> writes: > I dug around in the docs and found a named parameter that I can set > when I > call show. > > Definition: im.show(self, title=None, command=None) > > I installed irfanview and specified it/its path in the parameter, > but that didn't work either. It's really quite puzzling in the > case of Vista since that's been around for quite a few years now. But I thought everyone was sticking their fingers in their ears and humming to try to forget Vista had been released, particularly now that Windows 7 is out :-) Perhaps there's an issue with the temporary file location. I don't have a Vista system to test on, but the show() operation writes the image to a temporary file as returned by tempfile.mktemp(), and then passes the name on to the external viewer. The viewing command is handed to os.system() with the filename embedded without any special quoting. So if, for example, the temporary location has spaces or "interesting" characters, it probably won't get parsed properly. One easy debugging step is probably to add a print just before the os.system() call that views the image (bottom of _showxv function in Image.py in my copy of 1.1.6). That way at least you'll know the exact command being used. If that's the issue, there are various ways around it. You could patch PIL itself (same function) to quote the filename when it is constructing the command. Alternatively, the tempfile module has a tempdir global you could set to some other temporary directory before using the show() function (or any other code using tempfile). -- David |