path: root/Misc/NEWS.d/next/Library/2020-12-15-17-51-27.bpo-42630.jf4jBl.rst

:mod:`tkinter` functions and constructors which need a default root window
raise now :exc:`RuntimeError` with descriptive message instead of obscure
:exc:`AttributeError` or :exc:`NameError` if it is not created yet or cannot
be created automatically.