Can anyone tell me why does this problem occur?
On Apr 12, 2:13 pm, higer <higerinbeij...@gmail.com> wrote:
> Thanks for your suggestion. But Python 2.5 already has zlib moudle.
> To png file,I wrote lines of code to save it first on disk and then
> handled the saved copy,then that works.
> I do not why there is some differencies between png file and file of
> other formats.The following is my code:
>
> parser = ImageFile.Parser()
> for chunk in f.chunks():
> parser.feed(chunk)
> img = parser.close()
>
> if format == 'png':
> des_origin_f = open("tmp.png","ab")
> for chunk in f.chunks():
> des_origin_f.write(chunk)
> des_origin_f.close()
> img = Image.open("tmp.png")
>
> ##other operations to handle the image
> img.save("test"+"."+fileExt) #save this image
>
> I can not make sure whether the problem is caused by Django. Because
> what my code tells is thatPILcan handle the png file from a disk,but
> can not handle a png file from a Django response(you can see my code
> in the first message and compare with the code above).
>
> On Apr 10, 9:46 pm, Brian Neal <bgn...@gmail.com> wrote:
>
> > On Apr 9, 12:45 am, higer <higerinbeij...@gmail.com> wrote:
>
> > > When I upload a PNG file and usePILto handle it,there will be an
> > > error occured:
> > > 'NoneType' object is unsubscriptable
>
> > > I do not know why and other formats(BMP GIF JPG JPEG) are all ok.
>
> > I don't know if this is your problem, but in order to use certain file
> > formats inPILyou have to have some prequisites installed. Here is
> > thePILdoc page for PNG support:
>
> >http://www.pythonware.com/library/pil/handbook/format-png.htm
>
> > In particular, note:
>
> > "PILidentifies, reads, and writes PNG files containing "1", "L", "P",
> > "RGB", or "RGBA" data. Interlaced files are currently not supported."
>
> > And also:
>
> > "Note: To enable PNG support, you need to build and install the ZLIB
> > compression library before building the Python Imaging Library. See
> > the distribution README for details."
>
> > BN
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