PIL on OS X: ImportError: The _imaging C module is not installed

[qed777]

The Python Imaging Library's _imaging module is not installed on some OS X systems. This causes doctest failures in sage/plot/plot3d/base.pyx:

sage -t  -long devel/sage/sage/plot/plot3d/base.pyx
**********************************************************************
File "/Users/Sage/sage-4.6.alpha0/devel/sage-main/sage/plot/plot3d/base.pyx", line 1160:
    sage: G.save(f)
Exception raised:
    Traceback (most recent call last):
      File "/Users/Sage/sage-4.6.alpha0/local/bin/ncadoctest.py", line 1231, in run_one_test
        self.run_one_example(test, example, filename, compileflags)
      File "/Users/Sage/sage-4.6.alpha0/local/bin/sagedoctest.py", line 38, in run_one_example
        OrigDocTestRunner.run_one_example(self, test, example, filename, compileflags)
      File "/Users/Sage/sage-4.6.alpha0/local/bin/ncadoctest.py", line 1172, in run_one_example
        compileflags, 1) in test.globs
      File "<doctest __main__.example_35[4]>", line 1, in <module>
        G.save(f)###line 1160:
    sage: G.save(f)
      File "base.pyx", line 1198, in sage.plot.plot3d.base.Graphics3d.save (sage/plot/plot3d/base.c:11722)
        Image.open(out_filename).save(filename)
      File "/Users/Sage/sage-4.6.alpha0/local/lib/python2.6/site-packages/PIL/Image.py", line 1372, in save
        self.load()
      File "/Users/Sage/sage-4.6.alpha0/local/lib/python2.6/site-packages/PIL/ImageFile.py", line 155, in load
        self.load_prepare()
      File "/Users/Sage/sage-4.6.alpha0/local/lib/python2.6/site-packages/PIL/ImageFile.py", line 223, in load_prepare
        self.im = Image.core.new(self.mode, self.size)
      File "/Users/Sage/sage-4.6.alpha0/local/lib/python2.6/site-packages/PIL/Image.py", line 36, in __getattr__
        raise ImportError("The _imaging C module is not installed")
    ImportError: The _imaging C module is not installed
[...]

See also: sage-devel, sage-release.

Related tickets: #7344, #9864.

CC: @jhpalmieri @RalphieBoy @kcrisman @TimDumol

Component: packages: standard

Issue created by migration from https://trac.sagemath.org/ticket/10059

[kcrisman]

comment:1

Ah, now that I feel confident using SAGE_CHECK=yes, I see that this is going to bite in another place.

Code block begin...end
Plot 5
Code block begin...end
Plot 6
Inline formula 13
Code block begin...Traceback (most recent call last):
  File "example.sagetex.py", line 192, in <module>
<snip>
    raise ImportError("The _imaging C module is not installed")
ImportError: The _imaging C module is not installed
end
Plot 7
  saving sage-plots-for-example.tex/plot-7.eps failed; saving to sage-plots-for-example.tex/plot-7.png instead.

**** Error in Sage code on line 278 of example.tex! Traceback follows.

**** Running Sage on example.sage failed! Fix example.tex and try again.
Error running Sage on example.sagetex.sage!

real	0m53.056s
user	0m13.153s
sys	0m4.808s
************************************************************************
Error testing package sagetex-2.3.3.p2
************************************************************************

So now there are two places this causes failure - plot/plot3d/base.pyx and the sagetex package. Another reason to try #7344, perhaps.

[jhpalmieri]

comment:2

Have you tried building Sage with SAGE_BINARY_BUILD=yes? (See the [http://sagemath.org/doc/installation/source.html#environment-variables installation guide and the pil spkg.) That fixes some problems like this for me. It would be nice to not have to do this, of course...

[kcrisman]

comment:3

No, I haven't. On the other hand, I don't have one of those other tickets installed anyway.

[vbraun]

comment:8

We use now Pillow instead of PIL; Its likely that this is fixed. I haven't seen such an issue on the build bot.

I suggest to close it as fixed.

[kcrisman]

comment:9

I haven't seen it for a long time either, so I suggest we close it and open a new one as well if it comes up again, since it won't be quite the same.