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 that PIL can 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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