René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"gca(projection=\"rectilinear\") fails to reset projection on axes","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\nAs of 2.2:\r\n```\r\nplt.gca(projection=\"polar\"); plt.gca(projection=\"lambert\")\r\n```\r\nshows a warning and replaces the originally created polar axes by a lambert axes (not sure what behavior we actually want this to have once axes-collision detection in add_axes is removed).\r\nHowever, in\r\n```\r\nplt.gca(projection=\"polar\"); plt.gca(projection=\"rectilinear\")\r\n```\r\nthe second call to gca (using a rectilinear projection) fails to reset the projection at all and leaves the original polar axes in place.\r\n\r\nNoted while thinking about #10674.","author":{"url":"https://github.com/anntzer","@type":"Person","name":"anntzer"},"datePublished":"2018-03-06T10:17:29.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":7},"url":"https://github.com/10700/matplotlib/issues/10700"}