ERROR: matplotlib.tests.test_axes.test_contour_colorbar.test fails on Python 3

[mdboom]

I'm getting this on Python 3.x only on Fedora 17 with Numpy 1.7dev.

======================================================================
ERROR: matplotlib.tests.test_axes.test_contour_colorbar.test
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/mdboom/python3/lib/python3.2/site-packages/nose/case.py", line 198, in runTest
    self.test(*self.arg)
  File "/home/mdboom/python3/lib/python3.2/site-packages/matplotlib/testing/decorators.py", line 39, in failer
    result = f(*args, **kwargs)
  File "/home/mdboom/python3/lib/python3.2/site-packages/matplotlib/testing/decorators.py", line 145, in do_test
    figure.savefig(actual_fname)
  File "/home/mdboom/python3/lib/python3.2/site-packages/matplotlib/figure.py", line 1229, in savefig
    self.canvas.print_figure(*args, **kwargs)
  File "/home/mdboom/python3/lib/python3.2/site-packages/matplotlib/backend_bases.py", line 2089, in print_figure
    **kwargs)
  File "/home/mdboom/python3/lib/python3.2/site-packages/matplotlib/backend_bases.py", line 1843, in print_pdf
    return pdf.print_pdf(*args, **kwargs)
  File "/home/mdboom/python3/lib/python3.2/site-packages/matplotlib/backends/backend_pdf.py", line 2276, in print_pdf
    self.figure.draw(renderer)
  File "/home/mdboom/python3/lib/python3.2/site-packages/matplotlib/artist.py", line 57, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/home/mdboom/python3/lib/python3.2/site-packages/matplotlib/figure.py", line 930, in draw
    func(*args)
  File "/home/mdboom/python3/lib/python3.2/site-packages/matplotlib/artist.py", line 57, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/home/mdboom/python3/lib/python3.2/site-packages/matplotlib/axes.py", line 2002, in draw
    a.draw(renderer)
  File "/home/mdboom/python3/lib/python3.2/site-packages/matplotlib/artist.py", line 57, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/home/mdboom/python3/lib/python3.2/site-packages/matplotlib/collections.py", line 260, in draw
    self._offset_position)
  File "/home/mdboom/python3/lib/python3.2/site-packages/matplotlib/backends/backend_pdf.py", line 1533, in draw_path_collection
    self.check_gc(gc0, rgbFace)
  File "/home/mdboom/python3/lib/python3.2/site-packages/matplotlib/backends/backend_pdf.py", line 1436, in check_gc
    if delta: self.file.output(*delta)
  File "/home/mdboom/python3/lib/python3.2/site-packages/matplotlib/backends/backend_pdf.py", line 537, in output
    self.write(fill(list(map(pdfRepr, data))))
  File "/home/mdboom/python3/lib/python3.2/site-packages/matplotlib/backends/backend_pdf.py", line 212, in pdfRepr
    % type(obj))
TypeError: Don't know a PDF representation for <class 'numpy.int64'> objects.

[mdboom]

@jkseppan: Can you have a quick look at this, since it involves the PDF backend?

[jkseppan]

My suggestion is jkseppan@73c3573

In principle the pdf format differentiates between integers and floating-point numbers, so I would like to represent e.g. numpy.int64 as integers and numpy.float32 as floats (oddly, on my system in Python 3 numpy.int64 does not have int as base, but in Python 2 it does). In practice this probably doesn't matter.

[mdboom]

I agree your solution looks better. I'll go ahead and merge it.