René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Figure background is transparent when saving png from notebook backend.","articleBody":"\r\n### Bug report\r\nIn Jupyter notebook with `%matplotlib notebook`:\r\n**Code for reproduction**\r\n\r\n\u003c!--A minimum code snippet required to reproduce the bug, also minimizing the number of dependencies required--\u003e\r\n\r\n```python\r\nimport matplotlib.pyplot as plt\r\nfig, ax = plt.subplots()\r\nax.plot([1,2])\r\nfig.savefig('test.png')\r\n```\r\nI used a screenshot below instead of the file 'test.png' because the odd background only shows up in preview, which evidently uses a light gray background instead of the usual white.\r\n**Actual outcome**\r\n![screenshot_gray_background](https://cloud.githubusercontent.com/assets/85125/26334867/aeff9662-3f03-11e7-9030-b543c700522a.png)\r\n\r\n**Expected outcome**\r\nI expect the white figure background that results in the above example when saving a pdf, or when using a different backend.\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: OS X 10.12.4\r\n  * Matplotlib Version: 2.0.2+7.ge6295a4a7\r\n  * Python Version: 3.5.2\r\n  * Jupyter Version (if applicable): 4.2.1\r\n ","author":{"url":"https://github.com/efiring","@type":"Person","name":"efiring"},"datePublished":"2017-05-23T01:34:30.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/8654/matplotlib/issues/8654"}