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Add example for use cases requiring default values.

This commit is contained in:
Raymond Hettinger 2007-11-15 22:39:34 +00:00
parent 7c3738e11c
commit bc693491eb
1 changed files with 9 additions and 0 deletions
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Doc/library/collections.rst
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@ -492,6 +492,15 @@ the :meth:`__repr__` method:
>>> Point(x=10, y=20) >>> Point(x=10, y=20)
Point(10.000, 20.000) Point(10.000, 20.000)
Default values can be implemented by starting with a prototype instance
and customizing it with :meth:`__replace__`:
::
>>> Account = namedtuple('Account', 'owner balance transaction_count')
>>> model_account = Account('<owner name>', 0.0, 0)
>>> johns_account = model_account.__replace__(owner='John')
.. rubric:: Footnotes .. rubric:: Footnotes
.. [#] For information on the star-operator see .. [#] For information on the star-operator see