René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Legend does not show 'annotate'","articleBody":"When using `annotate` to draw an arrow, it does not show up in the legend.\r\n\r\nExample code:\r\n```python\r\nimport matplotlib.pylab as plt\r\n%matplotlib inline\r\n\r\nfig, ax = plt.subplots(1)\r\nax.plot([0, 1], [0, 0], label='line1')\r\nax.plot([0, 1], [1, 1], label='line2')\r\nax.annotate(\"\",\r\n            xy=(0.4,1.0),\r\n            xytext=(0.4,0.0),\r\n            arrowprops={'arrowstyle':'\u003c-\u003e', 'color':'C7' },\r\n            label='distance')\r\nax.legend()\r\n```\r\ngives:\r\n![annotate](https://cloud.githubusercontent.com/assets/1379463/23705362/c466052a-0409-11e7-886a-45e28b55fb7f.png)\r\n\r\nI would expect an entry \"distance\" in the legend, with a grey double-sided arrow as symbol.\r\n\r\n(I use Python 3.6.0 and Matplotlib 2.0.0 from Archlinux repository)","author":{"url":"https://github.com/jlecoeur","@type":"Person","name":"jlecoeur"},"datePublished":"2017-03-08T13:19:47.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/8236/matplotlib/issues/8236"}