[Debian-astro-maintainers] Bug#809700: python-astropy: build-dependency on python-matplotlib should be >= 1.5.0

[Ole Streicher]

Hi Steve,

are you sure that the problem is just the matplotlib version?

The exception is raised within matplotlib itself while trying to import
matplotlib.image:

astropy/visualization/scripts/tests/test_fits2bitmap.py:27:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_ _ _ _
astropy/visualization/scripts/fits2bitmap.py:138: in main
    power=args.power, asinh_a=args.asinh_a, cmap=args.cmap)
astropy/visualization/scripts/fits2bitmap.py:72: in fits2bitmap
    import matplotlib.image as mimg
/usr/lib/python3/dist-packages/matplotlib/image.py:17: in <module>
    import matplotlib.artist as martist
/usr/lib/python3/dist-packages/matplotlib/artist.py:12: in <module>
    from .transforms import Bbox, IdentityTransform, TransformedBbox, \

    """

    from __future__ import (absolute_import, division, print_function,
                            unicode_literals)

    import six

    import numpy as np
    from numpy import ma
>   from matplotlib._path import (affine_transform,
count_bboxes_overlapping_bbox,
        update_path_extents)
E       ImportError: No module named 'matplotlib._path'

/usr/lib/python3/dist-packages/matplotlib/transforms.py:39: ImportError

To me, this looks more that matplotlib-1.4.2 is buggy on kfreebsd. The
script in question is unchanged since a year, and worked well with
matplotlib 1.4.2 on linux-amd64 and others.

What do you think?