Current File : //opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/util/_collections.pyo
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t | j � S( s� Return a list of string key names for this :class:`.KeyedTuple`.
.. seealso::
:attr:`.KeyedTuple._fields`
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E.g.::
>>> k = KeyedTuple([1, 2, 3], labels=["one", "two", "three"])
>>> k.one
1
>>> k.two
2
Result rows returned by :class:`.Query` that contain multiple
ORM entities and/or column expressions make use of this
class to return rows.
The :class:`.KeyedTuple` exhibits similar behavior to the
``collections.namedtuple()`` construct provided in the Python
standard library, however is architected very differently.
Unlike ``collections.namedtuple()``, :class:`.KeyedTuple` is
does not rely on creation of custom subtypes in order to represent
a new series of keys, instead each :class:`.KeyedTuple` instance
receives its list of keys in place. The subtype approach
of ``collections.namedtuple()`` introduces significant complexity
and performance overhead, which is not necessary for the
:class:`.Query` object's use case.
.. seealso::
:ref:`ormtutorial_querying`
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.. seealso::
:meth:`.KeyedTuple.keys`
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