swizzle 2.2.0

Swizzle enables the retrieval of multiple attributes, similar to swizzling in computer graphics.

Swizzle

Swizzle for Python enhances attribute lookup methods to facilitate dynamic and flexible retrieval of multiple attributes based on specified arrangements of their names.

Update v2: Introducing swizzledtuple , a new function that allows you to create swizzled named tuples. This feature is inspired by the namedtuple function from the collections module and provides a concise way to define swizzled tuples.

from swizzle import swizzledtuple

Vector = swizzledtuple('Vector', 'x y z', arrange_names = "y z x x")

# Test the swizzle
v = Vector(1, 2, 3)
print(v)  # Output: Vector(y=2, z=3, x=1, x=1)
print(v.yzx)  # Output: Vector(y = 2, z = 3, x = 1)
print(v.yzx.xxzyzz)  # Output: Vector(x=1, x=1, z=3, y=2, z=3, z=3)

Swizzle Decorator:

import swizzle

@swizzle
class Vector:
    def __init__(self, x, y, z):
        self.x = x
        self.y = y
        self.z = z

# Test the swizzle
print(Vector(1, 2, 3).yzx)  # Output: Vector(y = 2, z = 3, x = 1)

Installation

From PyPI

pip install swizzle

From GitHub

pip install git+https://github.com/janthmueller/swizzle.git

Further Examples

Using swizzle with dataclass

import swizzle
from dataclasses import dataclass

@swizzle
@dataclass
class Vector:
    x: int
    y: int
    z: int

# Test the swizzle
print(Vector(1, 2, 3).yzx)  # Output: Vector(y = 2, z = 3, x = 1)

Using swizzle with IntEnum

import swizzle
from enum import IntEnum

@swizzle(meta=True)
class Vector(IntEnum):
    X = 1
    Y = 2
    Z = 3

# Test the swizzle
print(Vector.YXZ)  # Output: Vector(Y=<Vector.Y: 2>, X=<Vector.X: 1>, Z=<Vector.Z: 3>)

Setting the meta argument to True in the swizzle decorator extends the getattr behavior of the metaclass, enabling attribute swizzling directly on the class itself.

Sequential matching

Attributes are matched from left to right, starting with the longest substring match. This behavior can be controlled by the sep argument in the swizzle decorator.

import swizzle

@swizzle(meta=True)
class Vector:
    x = 1
    y = 2
    z = 3
    xy = 4
    yz = 5
    xz = 6
    xyz = 7

# Test the swizzle
print(Vector.xz)  # Output: 6
print(Vector.yz)  # Output: 5
print(Vector.xyyz)  # Output: Vector(xy=4, yz=5)
print(Vector.xyzx)  # Output: Vector(xyz=7, x=1)