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Python 属性のエイリアス

Posted at

property() をデコレータではなく、ただの関数として使う。
SQLAlchemy で使われている。

from operator import attrgetter


class A:
    def __init__(self):
        self.foo = "foo"

    f = property(attrgetter("foo"), doc="An alias for the :attr:`.foo` attribute.")


if __name__ == "__main__":
    help(A.f)

    a = A()
    print("A.foo:", a.foo)
    print("A.f:", a.f)

実行例。

$ python sample_alias.py
Help on property:

    An alias for the :attr:`.foo` attribute.

A.foo: foo
A.f: foo
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