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bpo-42630: Improve error reporting in Tkinter for absent default root (GH-23781)

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

* Add tests for all functions which use default root window.

* Fix import in the pynche script.
This commit is contained in:
Serhiy Storchaka 2020-12-19 12:17:08 +02:00 • committed by GitHub
parent 1e27b57dbc
commit 3d569fd6dc
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19 changed files with 315 additions and 87 deletions
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4
Lib/idlelib/pyshell.py
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@ -1061,8 +1061,10 @@ class PyShell(OutputWindow):
(sys.version, sys.platform, self.COPYRIGHT, nosub))
self.text.focus_force()
self.showprompt()
# User code should use separate default Tk root window
import tkinter
tkinter._default_root = None # 03Jan04 KBK What's this?
tkinter._support_default_root = True
tkinter._default_root = None
return True
def stop_readline(self):