Hi,
I think the problem is that Python 3 now distinguishes between strings
(unicode) and binary strings (not unicode?). Try using
img_string = b"\77\77\77\33\177\177\177\44\277\277\277\55\377\0\0\66" + \
b"\0\377\0\77\0\01\37\0"
Note the extra "b" before the leading quotes. This problem comes up in
quite a few places with Python 3 that I've been encountering recently, not
just with PyX.
I've not tested this but hopefully it works!
Cheers
David
--
David Barton
On 30 Mar 2015 22:21, "Arnd Baecker" <[email protected]> wrote:
> Hi,
>
> in the process of preparing our transition to python 3
> I encountered a problem with bitmap, which could
> be boiled down to:
>
> #------------------------------
> from pyx import *
> img_string = "\77\77\77\33\177\177\177\44\277\277\277\55\377\0\0\66" + \
> "\0\377\0\77\0\01\37\0"
> image_rgb = bitmap.image(3, 2, "RGBA", img_string)
> bitmap_rgb = bitmap.bitmap(0, 0, image_rgb, height=0.8)
> c = canvas.canvas()
> c.insert(bitmap_rgb)
> c.writePDFfile("minimal")
> #------------------
>
> This code runs fine under python 2.7 (and pyx 0.12.1)
> while under python 3.4 (and pyx 0.13) I get:
> lib/python3.4/site-packages/pyx/bitmap.py", line 375, in imagedata
> data = zlib.compress(data.tobytes(), self.flatecompresslevel)
> TypeError: 'str' does not support the buffer interface
>
> Can you reproduce this (in 0.13.0 and in trunk)?
> (I also manually tried to apply the change
> http://sourceforge.net/p/pyx/code/3598/
> but this did not help, or I did not apply it correctly).
>
> Nothing urgent, as we won't be moving to python 3 that soon,
> but still a fix or work-around would be nice ...
>
> Many thanks, best,
>
> Arnd
>
>
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