Merged revisions 66686 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
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r66686 | martin.v.loewis | 2008-09-30 00:09:07 +0200 (Di, 30 Sep 2008) | 5 lines
Issue #3965: Allow repeated calls to turtle.Screen, by making it a
true singleton object.
Reviewed by Gregor Lingl.
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diff --git a/Doc/library/turtle.rst b/Doc/library/turtle.rst
index 79297eb..64df742 100644
--- a/Doc/library/turtle.rst
+++ b/Doc/library/turtle.rst
@@ -40,10 +40,10 @@
:class:`ScrolledCanvas` as argument. It should be used when :mod:`turtle` is
used as part of some application.
- Derived from :class:`TurtleScreen` is the subclass :class:`Screen`. Screen
- is implemented as sort of singleton, so there can exist only one instance of
- Screen at a time. It should be used when :mod:`turtle` is used as a
- standalone tool for doing graphics.
+ The function :func:`Screen` returns a singleton object of a
+ :class:`TurtleScreen` subclass. This function should be used when
+ :mod:`turtle` is used as a standalone tool for doing graphics.
+ As a singleton object, inheriting from its class is not possible.
All methods of TurtleScreen/Screen also exist as functions, i.e. as part of
the procedure-oriented interface.