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#5493: clarify __nonzero__ docs.

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Georg Brandl 2009-03-15 21:37:16 +00:00
parent 4c95e091d6
commit 3259ef3dff
1 changed files with 5 additions and 4 deletions
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Doc/reference/datamodel.rst
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@ -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)