From 51449f5346bbea7832f03e3030bdaa9100ac9891 Mon Sep 17 00:00:00 2001 From: Georg Brandl Date: Mon, 2 Aug 2010 21:47:02 +0000 Subject: [PATCH] Merged revisions 83567 via svnmerge from svn+ssh://pythondev@svn.python.org/python/branches/release27-maint ................ r83567 | georg.brandl | 2010-08-02 22:32:03 +0200 (Mo, 02 Aug 2010) | 9 lines Merged revisions 83552 via svnmerge from svn+ssh://pythondev@svn.python.org/python/branches/py3k ........ r83552 | georg.brandl | 2010-08-02 21:36:36 +0200 (Mo, 02 Aug 2010) | 1 line #9438: clarify that constant names also cannot be assigned as attributes. ........ ................ --- Doc/library/constants.rst | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/Doc/library/constants.rst b/Doc/library/constants.rst index b02e04edaa0..80e792c9521 100644 --- a/Doc/library/constants.rst +++ b/Doc/library/constants.rst @@ -3,7 +3,6 @@ Built-in Constants A small number of constants live in the built-in namespace. They are: - .. data:: False The false value of the :class:`bool` type. @@ -39,16 +38,23 @@ A small number of constants live in the built-in namespace. They are: Special value used in conjunction with extended slicing syntax. - .. XXX Someone who understands extended slicing should fill in here. - .. data:: __debug__ This constant is true if Python was not started with an :option:`-O` option. - Assignments to :const:`__debug__` are illegal and raise a :exc:`SyntaxError`. See also the :keyword:`assert` statement. +.. note:: + + The names :data:`None` and :data:`__debug__` cannot be reassigned + (assignments to them, even as an attribute name, raise :exc:`SyntaxError`), + so they can be considered "true" constants. + + .. versionchanged:: 2.7 + Assignments to ``__debug__`` as an attribute became illegal. + + Constants added by the :mod:`site` module -----------------------------------------