René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"set_rlim(bottom=...) no longer works","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\nSetting the lower rlim of polar plots with set_rlim(bottom=...) is particularly useful given https://github.com/matplotlib/matplotlib/issues/13292, but got broken in https://github.com/matplotlib/matplotlib/pull/12300 (master only, attn @jklymak).\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\n```python\r\npolar([1, 2]); gca().set_rlim(bottom=.5)\r\n```\r\n\r\n**Actual outcome**\r\n\r\n```\r\nTraceback (most recent call last):\r\n  File \"\u003cstring\u003e\", line 4, in \u003cmodule\u003e\r\n  File \"matplotlib/lib/matplotlib/projections/polar.py\", line 1153, in set_rlim\r\n    **kwargs)\r\n  File \"matplotlib/lib/matplotlib/projections/polar.py\", line 1205, in set_ylim\r\n    if top is None and len(bottom) == 2:\r\nTypeError: object of type 'float' has no len()\r\n```\r\n\r\n**Expected outcome**\r\n\r\nno error (which is the case as of mpl 3.0)\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:\r\n  * Matplotlib version: master\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`):\r\n  * Python version:\r\n  * Jupyter version (if applicable):\r\n  * Other libraries: \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\n","author":{"url":"https://github.com/anntzer","@type":"Person","name":"anntzer"},"datePublished":"2019-02-18T23:38:26.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/13464/matplotlib/issues/13464"}