Python object index for fast, declarative retrieval
Project description
odex
Python object index for fast, declarative retrieval
Install
pip install odex
Usage
Odex provides a set-like collection called IndexedSet
:
from collections import namedtuple
from odex import IndexedSet, HashIndex, attr, and_
X = namedtuple("X", ["a", "b"])
iset = IndexedSet(
[
X(a=1, b=4),
X(a=2, b=5),
X(a=2, b=6),
X(a=3, b=7),
],
indexes=[HashIndex("a")]
)
# Filter objects with SQL-like expressions:
iset.filter("a = 2 AND b = 5") == {X(a=2, b=5)}
# Or, using the fluent interface:
iset.filter(
and_(
attr("a").eq(2),
attr("b").eq(5)
)
) == {X(a=2, b=5)}
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