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bpo-26571-Class variable _RUNNING update at the __init__ end #30332

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bpo-26571-Class variable _RUNNING update at the __init__ end #30332

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a22773d
Class variable _RUNNING update at the __init__ end
williamnavaraj Jan 2, 2022
36460bb
📜🤖 Added by blurb_it.
blurb-it[bot] Jan 2, 2022
25d7d6a
Merge branch 'python:main' into patch-1
williamnavaraj Jan 3, 2022
865a894
Added comments. Enables running this in notebooks.
williamnavaraj Jan 3, 2022
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5 changes: 5 additions & 0 deletions Lib/turtle.py
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Expand Up @@ -1002,6 +1002,11 @@ def __init__(self, cv, mode=_CFG["mode"],
rootwindow = cv.winfo_toplevel()
rootwindow.call('wm', 'attributes', '.', '-topmost', '1')
rootwindow.call('wm', 'attributes', '.', '-topmost', '0')
# The class variable _RUNNING being persistent after this module is imported, this should be made True when the next object is created.
# This is particularly needed for running in notebooks or GUI application but does not affect the usual self-contained single instance execution
# nor any of the turtle-demos

TurtleScreen._RUNNING = True

def clear(self):
"""Delete all drawings and all turtles from the TurtleScreen.
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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Tools-Demos/2022-01-02-07-31-17.bpo-26571.becZjl.rst
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@@ -0,0 +1 @@
Turtle based code used to raise terminator exception (usually on every second run) in applications such as Jupyter/Spyder notebooks. Update to fix this error.