René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"SIGINT is ignored by MacOSX backend","articleBody":"Here is an example:\n\n```\nimport matplotlib\n#matplotlib.use('Qt4Agg')\nfrom matplotlib import pyplot as plt\nplt.plot(1, 1)\nplt.show()\n```\n\nRun this script from terminal, wait for the window to appear and press Ctrl-C (in terminal). The script will not die.\nThen uncomment the `matplotlib.use` line an Ctrl-C will work as intended.\n\nUPD:\nIf I press Ctrl-C and then move mouse over the plot window the following exception appears in  the log:\n\n```\nTraceback (most recent call last):\n  File \"/opt/local/Library/Frameworks/Python.framework/Versions/3.3/lib/python3.3/site-packages/matplotlib/backend_bases.py\", line 1850, in enter_notify_event\n    def enter_notify_event(self, guiEvent=None, xy=None):\nKeyboardInterrupt\n```\n\nThe same is for callback set using `signal.signal(signal.SIGTERM, cb)`, callback is not called until window receives any event (focus change, mouse move, etc).\n","author":{"url":"https://github.com/Equidamoid","@type":"Person","name":"Equidamoid"},"datePublished":"2015-01-10T07:40:28.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":15},"url":"https://github.com/3991/matplotlib/issues/3991"}