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xkcd plots stopped working on Mac OS X. #5049

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#5217
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xkcd plots stopped working on Mac OS X.#5049
#5217
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mdboom
Labels
GUI: MacOSXOS: Apple
Milestone
v1.5.0

Description

@mario-grgic
mario-grgic
opened on Sep 11, 2015

The matplotlib xkcd example plots at

http://matplotlib.org/examples/showcase/xkcd.html

stopped working with matplotlib 1.4.x (they used to work with earlier versions). This is with Python 2.7.5 on Mac OS X 10.9.5 and matplotlib 1.4.3.

The following Traceback is printed if I run one of the examples:

Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/matplotlib/artist.py", line 59, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/Library/Python/2.7/site-packages/matplotlib/figure.py", line 1085, in draw
    func(*args)
  File "/Library/Python/2.7/site-packages/matplotlib/artist.py", line 59, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/Library/Python/2.7/site-packages/matplotlib/axes/_base.py", line 2110, in draw
    a.draw(renderer)
  File "/Library/Python/2.7/site-packages/matplotlib/artist.py", line 59, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/Library/Python/2.7/site-packages/matplotlib/lines.py", line 715, in draw
    drawFunc(renderer, gc, tpath, affine.frozen())
  File "/Library/Python/2.7/site-packages/matplotlib/lines.py", line 1072, in _draw_lines
    self._lineFunc(renderer, gc, path, trans)
  File "/Library/Python/2.7/site-packages/matplotlib/lines.py", line 1112, in _draw_solid
    renderer.draw_path(gc, path, trans)
  File "/Library/Python/2.7/site-packages/matplotlib/patheffects.py", line 115, in draw_path
    rgbFace)
  File "/Library/Python/2.7/site-packages/matplotlib/patheffects.py", line 217, in draw_path
    renderer.draw_path(gc, tpath, affine, rgbFace)
  File "/Library/Python/2.7/site-packages/matplotlib/backends/backend_macosx.py", line 58, in draw_path
    gc.draw_path(path, transform, linewidth, rgbFace)
AttributeError: GraphicsContextBase instance has no attribute 'draw_path'
Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/matplotlib/artist.py", line 59, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/Library/Python/2.7/site-packages/matplotlib/figure.py", line 1085, in draw
    func(*args)
  File "/Library/Python/2.7/site-packages/matplotlib/artist.py", line 59, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/Library/Python/2.7/site-packages/matplotlib/axes/_base.py", line 2110, in draw
    a.draw(renderer)
  File "/Library/Python/2.7/site-packages/matplotlib/artist.py", line 59, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/Library/Python/2.7/site-packages/matplotlib/axis.py", line 1119, in draw
    tick.draw(renderer)
  File "/Library/Python/2.7/site-packages/matplotlib/artist.py", line 59, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/Library/Python/2.7/site-packages/matplotlib/axis.py", line 244, in draw
    self.tick1line.draw(renderer)
  File "/Library/Python/2.7/site-packages/matplotlib/artist.py", line 59, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/Library/Python/2.7/site-packages/matplotlib/lines.py", line 760, in draw
    rgbaFace)
  File "/Library/Python/2.7/site-packages/matplotlib/patheffects.py", line 127, in draw_markers
    **kwargs)
  File "/Library/Python/2.7/site-packages/matplotlib/backend_bases.py", line 265, in draw_markers
    rgbFace)
  File "/Library/Python/2.7/site-packages/matplotlib/patheffects.py", line 115, in draw_path
    rgbFace)
  File "/Library/Python/2.7/site-packages/matplotlib/patheffects.py", line 217, in draw_path
    renderer.draw_path(gc, tpath, affine, rgbFace)
  File "/Library/Python/2.7/site-packages/matplotlib/backends/backend_macosx.py", line 58, in draw_path
    gc.draw_path(path, transform, linewidth, rgbFace)
AttributeError: GraphicsContextBase instance has no attribute 'draw_path'

Activity

  1. mdboom commented on Sep 11, 2015

    @mdboom
    mdboom
    on Sep 11, 2015
    Member

    Seems to be specific to the macosx backed. Cc: @mdehoon

  2. mdboom
    added
    OS: Apple
    GUI: MacOSX
    on Sep 11, 2015

  3. mdehoon commented on Sep 11, 2015

    @mdehoon
    mdehoon
    on Sep 11, 2015
    Contributor

    Why, on line 217 in patheffects.py, is renderer.draw_path(gc, ...) being called on a RendererMac object while gc is a GraphicsContextBase instead of a GraphicsContextMac? I suspect a call to

            # Get the real renderer, not a PathEffectRenderer.
        if isinstance(renderer, PathEffectRenderer):
            renderer = renderer._renderer

    is missing, but it may be some deeper problem.

  4. tacaswell commented on Sep 12, 2015

    @tacaswell
    tacaswell
    on Sep 12, 2015
    Member

    Is this related to #4024 ?

  5. tacaswell
    added this to the milestone on Sep 12, 2015

  6. mdehoon commented on Sep 14, 2015

    @mdehoon
    mdehoon
    on Sep 14, 2015
    Contributor

    @tacaswell I think what we are seeing here is a more fundamental issue. If we solve this one then #4024 will likely also be solved; the opposite is not true though.

  7. mdehoon commented on Oct 5, 2015

    @mdehoon
    mdehoon
    on Oct 5, 2015
    Contributor

    The equivalent bug appears with the gtkcairo backend:

    File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib-0_unknown-py2.7-macosx-10.9-intel.egg/matplotlib/backends/backend_cairo.py", line 153, in draw_path
    ctx = gc.ctx
AttributeError: 'GraphicsContextBase' object has no attribute 'ctx'

    The origin of the bug is the same: The gtkcairo renderer is used with a generic (GraphicsContextBase) graphics context instead of a GraphicsContextCairo graphics context.

  8. mdehoon commented on Oct 9, 2015

    @mdehoon
    mdehoon
    on Oct 9, 2015
    Contributor

    Also broken in the same way with the GTK backend:

    AttributeError: 'GraphicsContextBase' object has no attribute 'gdkGC'

    and with the ps backend:

    AttributeError: 'GraphicsContextBase' object has no attribute 'shouldstroke'
  9. mdboom
    modified the milestones: , on Oct 9, 2015
  10. mdboom
    self-assigned this
    on Oct 9, 2015
  11. mdboom
    added a commit that references this issue on Oct 9, 2015

    Fix PathEffect rendering on some backends

    bfab80e
  12. mdboom
    added
    status: needs review
    on Oct 9, 2015
  13. tacaswell
    closed this as completedin #5217on Oct 9, 2015
  14. tacaswell
    removed
    status: needs review
    on Oct 9, 2015
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