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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Tkinter not installed correctly on Windows 3.15.0b2","articleBody":"# Bug report\n\n### Bug description:\n\n3.15.0b1 was fine.  3.15.0b2 will not start tk/tcl.  Difference must be incomplete upgrade to tk 9.0.\n\nIf I run the REPL with either the Start icon or `py` in a console, `import tkinter` works but a subsequent `t = tkinter.Text()` fails with \n```pytb\nTraceback (most recent call last):\n  File \"\u003cpython-input-2\u003e\", line 1, in \u003cmodule\u003e\n    t = tkinter.Text()\n  File \"C:\\Programs\\Python315\\Lib\\tkinter\\__init__.py\", line 3857, in __init__\n    Widget.__init__(self, master, 'text', cnf, kw)\n    ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n  File \"C:\\Programs\\Python315\\Lib\\tkinter\\__init__.py\", line 2853, in __init__\n    self._setup(master, cnf)\n    ~~~~~~~~~~~^^^^^^^^^^^^^\n  File \"C:\\Programs\\Python315\\Lib\\tkinter\\__init__.py\", line 2818, in _setup\n    master = _get_default_root()\n  File \"C:\\Programs\\Python315\\Lib\\tkinter\\__init__.py\", line 330, in _get_default_root\n    root = Tk()\n  File \"C:\\Programs\\Python315\\Lib\\tkinter\\__init__.py\", line 2535, in __init__\n    self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use)\n              ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n_tkinter.TclError: Can't find a usable tk.tcl in the following directories:\n    //zipfs:/app/tk_library //zipfs:/lib/tk/tk_library //zipfs:/lib/tk //zipfs:/lib/tcl/tcl_library/tk9.0 //zipfs:/lib/tcl/tk9.0 C:/Programs/lib/tk9.0 C:/Programs/lib/tk9.0 C:/lib/tk9.0 C:/Programs/library\n```\nThis probably means that tk wasn't installed properly.\n\nThe IDLE icon in the start menu does not work.  If I pin it to taskbar and click, the blue circle starts and quickly stops.  The one for older versions start, quickly stop, and quickly restart until IDLE runs.  In a console, `py -m idlelib` fails at the same _tkinter.create(...) call with the same message.\n\nI have seen a similar message before and I believe the list of directories is obsolete.  In a local build, I believe the tcl/tk file needs to be in PCbuild/\u003cdirectory containing python.pyw\u003e. My 3.16 build works fine.  Installations used to have DLLs/tcl86t.dll and tk86t.dll.  3.15.0b2 has tcl9tk90.dll and tcl90.dll (no t suffix).  Is _tkinter.dll looking for those names?\n\n### CPython versions tested on:\n\n3.15\n\n### Operating systems tested on:\n\nWindows\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-150888\n* gh-151562\n* gh-151735\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/terryjreedy","@type":"Person","name":"terryjreedy"},"datePublished":"2026-06-03T06:30:50.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":21},"url":"https://github.com/150836/cpython/issues/150836"}