René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Surprising/changed axis limit (autoscale) behavior","articleBody":"### Bug report\r\n\r\n**Bug summary**\r\n\r\nThe interaction of setting axis limits and autoscaling changed in 3.2 with little guidance, introducing unexpected behavior that doesn't always make sense.\r\n\r\n**Code for reproduction**\r\n\r\nHere is a plot that looks very different on 3.1.2 and 3.2.1\r\n\r\n```python\r\nimport numpy as np\r\nimport matplotlib.pyplot as plt\r\nf, ax = plt.subplots()\r\nx = np.arange(100)\r\ny = np.random.uniform(-.1, .1, 100)\r\nax.scatter(x, y)\r\nassert ax._autoscaleYon\r\nax.set_ylim((-.5, .5), auto=None)\r\n```\r\n\r\n**Actual outcome**\r\n\r\nOn 3.2.1\r\n\r\n![image](https://user-images.githubusercontent.com/315810/81074711-656ca600-8eb7-11ea-9929-cef357be7cf1.png)\r\n\r\n**Expected outcome**\r\n\r\nOn 3.1.2\r\n\r\n![image](https://user-images.githubusercontent.com/315810/81074777-79b0a300-8eb7-11ea-8510-2bddabb72dd1.png)\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: macOS\r\n  * Matplotlib version: 3.2.1\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`): pylab inline\r\n  * Python version: 3.7\r\n\r\n","author":{"url":"https://github.com/mwaskom","@type":"Person","name":"mwaskom"},"datePublished":"2020-05-05T14:02:55.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":12},"url":"https://github.com/17331/matplotlib/issues/17331"}