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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Tkinter: test_configure_screen should only run on X11","articleBody":"test_configure_screen uses the `DISPLAY` environment variable, which is only relevant to X11; and the purpose of the test is to set the `-screen` option for a toplevel, which is only useful on Tk for X11, since Tk for the Win32 or Aqua windowing systems only support a single “screen” (called `:0` by default).\r\n\r\nI use XQuartz installed from MacPorts, and so the `DISPLAY` environment variable is usually set. test_configure_screen tries to use `DISPLAY` even if I am running the test on Tk Aqua:\r\n\r\n```\r\n======================================================================\r\nERROR: test_configure_screen (test.test_tkinter.test_widgets.ToplevelTest.test_configure_screen)\r\n----------------------------------------------------------------------\r\nTraceback (most recent call last):\r\n  File \"/Users/user/git/cpython/Lib/test/test_tkinter/test_widgets.py\", line 86, in test_configure_screen\r\n    widget2 = self.create(screen=display)\r\n              ^^^^^^^^^^^^^^^^^^^^^^^^^^^\r\n  File \"/Users/user/git/cpython/Lib/test/test_tkinter/test_widgets.py\", line 69, in create\r\n    return tkinter.Toplevel(self.root, **kwargs)\r\n           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\r\n  File \"/Users/user/git/cpython/Lib/tkinter/__init__.py\", line 2678, in __init__\r\n    BaseWidget.__init__(self, master, 'toplevel', cnf, {}, extra)\r\n  File \"/Users/user/git/cpython/Lib/tkinter/__init__.py\", line 2629, in __init__\r\n    self.tk.call(\r\n_tkinter.TclError: couldn't connect to display \"/private/tmp/com.apple.launchd.yqEvGPTxFm/org.macports:0\"\r\n```\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-104462\n* gh-104526\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/chrstphrchvz","@type":"Person","name":"chrstphrchvz"},"datePublished":"2023-05-14T02:52:47.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/104461/cpython/issues/104461"}