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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Test errors with numpy 1.5 - advice?","articleBody":"I am getting test errors with current matplotlib trunk and numpy 1.5.1.  An example is here:\n\n```\n======================================================================\nERROR: test suite for \u003cclass 'matplotlib.tests.test_axes.test_hist_stacked_bar'\u003e\n----------------------------------------------------------------------\nTraceback (most recent call last):\n  File \"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/plugins/multiprocess.py\", line 788, in run\n    self.setUp()\n  File \"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/suite.py\", line 291, in setUp\n    self.setupContext(ancestor)\n  File \"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/plugins/multiprocess.py\", line 770, in setupContext\n    super(NoSharedFixtureContextSuite, self).setupContext(context)\n  File \"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/suite.py\", line 314, in setupContext\n    try_run(context, names)\n  File \"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/util.py\", line 470, in try_run\n    return func()\n  File \"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/testing/decorators.py\", line 139, in setup_class\n    cls._func()\n  File \"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/tests/test_axes.py\", line 1988, in test_hist_stacked_bar\n    ax.hist(d, bins=10, histtype='barstacked', align='mid', color=colors, label=labels)\n  File \"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/axes/_axes.py\", line 5479, in hist\n    flat = np.ravel(x)\n  File \"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/core/fromnumeric.py\", line 1097, in ravel\n    return asarray(a).ravel(order)\n  File \"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/core/numeric.py\", line 284, in asarray\n    return array(a, dtype, copy=False, order=order)\nValueError: setting an array element with a sequence.\n```\n\nSee: https://s3.amazonaws.com/archive.travis-ci.org/jobs/29198712/log.txt\n\nThis boils down to the following code:\n\n```\nIn [5]: x = [[], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]]\n\nIn [6]: np.array(x)\n```\n\nThis raises an error (setting an array element with a sequence) for numpy 1.5.1 but passes for numpy 1.6.0.  Should I try and work round this, or should matplotlib update compatibility to numpy 1.6.0 ?\n","author":{"url":"https://github.com/matthew-brett","@type":"Person","name":"matthew-brett"},"datePublished":"2014-07-06T00:29:54.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/3191/matplotlib/issues/3191"}