René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"ImageComparisonFailure: Image sizes do not match expected size","articleBody":"\u003c!--To help us understand and resolve your issue, please fill out the form to the best of your ability.--\u003e\r\n\u003c!--You can feel free to delete the sections that do not apply.--\u003e\r\n\r\n### Bug report\r\n\r\n**Bug summary**\r\n\r\n\u003c!--A short 1-2 sentences that succinctly describes the bug--\u003e\r\n\r\n`matplotlib.testing.compare.compare_images` complains about image sizes do not match.\r\n\r\n**Code for reproduction**\r\n\r\n\u003c!--A minimum code snippet required to reproduce the bug.\r\nPlease make sure to minimize the number of dependencies required, and provide\r\nany necessary plotted data.\r\nAvoid using threads, as Matplotlib is (explicitly) not thread-safe.--\u003e\r\n\r\nastropy 4.0.dev24570\r\nmatplotlib 3.0.2+2458.g959e9f3a9\r\n\r\n```python\r\nimport os\r\n\r\nfrom matplotlib import pyplot as plt\r\n\r\nfrom astropy.io import fits\r\nfrom astropy.wcs import WCS\r\n\r\n# https://github.com/astropy/astropy/blob/master/astropy/visualization/wcsaxes/tests/data/msx_header\r\ndata_dir = '/my/path/astropy/visualization/wcsaxes/tests/data'\r\nmsx_header = fits.Header.fromtextfile(os.path.join(data_dir, 'msx_header'))\r\nwcs = WCS(msx_header)\r\n\r\nfig = plt.figure(figsize=(3, 3))\r\nax = fig.add_axes([0.25, 0.25, 0.5, 0.5], projection=wcs, aspect='auto')\r\nax.coords[0].set_axislabel(\"Label 1\")\r\nax.coords[1].set_axislabel(\"Label 2\")\r\nax.coords[1].set_axislabel_visibility_rule('always')\r\nax.coords[1].ticklabels.set_visible(False)\r\n\r\nplt.draw()\r\nfig.savefig('ztemp.png')\r\n```\r\n\r\nThis is supposed to produce something that looks like [test_axislabels_regression.png](https://github.com/astropy/astropy-data/blob/gh-pages/testing/astropy/2018-10-24T12:38:34.134556/3.0.x/test_axislabels_regression.png).\r\n\r\n**Actual outcome**\r\n\r\n\u003c!--The output produced by the above code, which may be a screenshot, console output, etc.--\u003e\r\n\r\nDownloading the \"truth\" file above and then doing this comparison locally on my machine, I get this:\r\n\r\n```python\r\n\u003e\u003e\u003e from matplotlib.testing.compare import compare_images\r\n\u003e\u003e\u003e compare_images('test_axislabels_regression.png', 'ztemp.png', tol=2)\r\n...\r\nImageComparisonFailure: Image sizes do not match expected size:\r\n(214, 208, 3) actual size (300, 300, 3)\r\n```\r\n\r\nOn CircleCI, we get something like https://circleci.com/gh/astropy/astropy/30970\r\n\r\n```\r\nImageComparisonFailure: Image sizes do not match expected size:\r\n(214, 208, 3) actual size (170, 170, 3)\r\n```\r\n\r\nxref astropy/astropy#8678\r\n\r\n**Expected outcome**\r\n\r\n\u003c!--A description of the expected outcome from the code snippet--\u003e\r\n\u003c!--If this used to work in an earlier version of Matplotlib, please note the version it used to work on--\u003e\r\n\r\nI am not sure what the expected outcome should be. Is there a way to ignore image size? It seems that image size depends on the machine you are running on.\r\n\r\n**Matplotlib version**\r\n\u003c!--Please specify your platform and versions of the relevant libraries you are using:--\u003e\r\n  * Operating system: RHEL7 (locally) and Debian (CircleCI)\r\n  * Matplotlib version: 3.0.2+2458.g959e9f3a9 (locally) and 3.0.2+2456.g28e32c6 (CircleCI)\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`): Qt5Agg (locally) \r\n  * Python version: 3.7.1 (locally) and 3.6.7 (CircleCI)\r\n  * Jupyter version (if applicable): N/A\r\n  * Other libraries: astropy, numpy\r\n\r\n\u003c!--Please tell us how you installed matplotlib and python e.g., from source, pip, conda--\u003e\r\n\u003c!--If you installed from conda, please specify which channel you used if not the default--\u003e\r\n\r\nI installed the dev version locally using `pip install git+https://https://github.com/matplotlib/matplotlib` command.","author":{"url":"https://github.com/pllim","@type":"Person","name":"pllim"},"datePublished":"2019-05-09T17:38:52.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":8},"url":"https://github.com/14180/matplotlib/issues/14180"}