[3.13] gh-156961: Fix tkinter.font.Font for a font name returned as a Tcl object (GH-157028) - #157405
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serhiy-storchaka merged 1 commit intoSep 13, 2026
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…d as a Tcl object (pythonGH-157028) Tk can return a font name as a Tcl object, for example from ttk.Style().lookup("TButton", "font"), Menu.entrycget("font"), ttk.Entry.cget("font"), or the default value in the result of configure(). Such an object does not compare equal to a string, so it was not recognized as the name of an existing named font. Keep it as is, so that it is passed back to Tk, and only convert it where it is compared with a string. (cherry picked from commit 62cbd34)
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Manual backport of GH-157028: the cherry-pick does not apply, because this branch has no wrapped font descriptions (gh-143990), so
Font.nameis always a string here and__str__needs a different fix. The test for wrapping a Tcl object as a font description is omitted for the same reason.Tk can return a font name as a Tcl object rather than a string, for example from
ttk.Style().lookup("TButton", "font"),Menu.entrycget("font"),ttk.Entry.cget("font"), or the default value in the result ofconfigure(). Such an object does not compare equal to a string, so it was not recognized as the name of an existing named font, and the code from the issue failed withTclError: named font TkDefaultFont does not already exist.The object is now kept as is, so that it is passed back to Tk, which reuses the font resource cached in it. It is only converted where it is compared with a string.