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| author | Raymond Hettinger <python@rcn.com> | 2007-11-15 22:39:34 (GMT) |
|---|---|---|
| committer | Raymond Hettinger <python@rcn.com> | 2007-11-15 22:39:34 (GMT) |
| commit | bc693491eb357d5683473c22af3db867b4c0141d (patch) | |
| tree | be64342c5d07a7a07988a717801828ab974c09d5 /Doc/library/collections.rst | |
| parent | 7c3738e11c35a7ac1c4ea8bdff9ec4d906db537e (diff) | |
| download | cpython-bc693491eb357d5683473c22af3db867b4c0141d.zip cpython-bc693491eb357d5683473c22af3db867b4c0141d.tar.gz cpython-bc693491eb357d5683473c22af3db867b4c0141d.tar.bz2 | |
Add example for use cases requiring default values.
Diffstat (limited to 'Doc/library/collections.rst')
| -rw-r--r-- | Doc/library/collections.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst index 89885ab..bdc0b86 100644 --- a/Doc/library/collections.rst +++ b/Doc/library/collections.rst @@ -492,6 +492,15 @@ the :meth:`__repr__` method: >>> Point(x=10, y=20) 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 .. [#] For information on the star-operator see |