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| -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 89885abd76..bdc0b86a59 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 |