From: Georg Brandl Date: Sun, 15 Mar 2009 21:37:16 +0000 (+0000) Subject: #5493: clarify __nonzero__ docs. X-Git-Tag: v2.7a1~1859 X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=3259ef3dff534dd0c106905ffa6e14d8fe7181e1;p=python #5493: clarify __nonzero__ docs. --- diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst index d083af518e..0c1a10e663 100644 --- a/Doc/reference/datamodel.rst +++ b/Doc/reference/datamodel.rst @@ -1424,11 +1424,12 @@ Basic customization .. index:: single: __len__() (mapping object method) - Called to implement truth value testing, and the built-in operation ``bool()``; + Called to implement truth value testing and the built-in operation ``bool()``; should return ``False`` or ``True``, or their integer equivalents ``0`` or - ``1``. When this method is not defined, :meth:`__len__` is called, if it is - defined (see below). If a class defines neither :meth:`__len__` nor - :meth:`__nonzero__`, all its instances are considered true. + ``1``. When this method is not defined, :meth:`__len__` is called, if it is + defined, and the object is considered true if its result is nonzero. + If a class defines neither :meth:`__len__` nor :meth:`__nonzero__`, all its + instances are considered true. .. method:: object.__unicode__(self)