安装
pip install attrs
代码示例
1、定义一个tuple
p1 = (1, 2) p2 = (1, 2) print(p1 == p2) # True print(p1) # (1, 2)
2、namedtuple定义一个类
from collections import namedtuple Point = namedtuple("Point", ["x", "y"]) p1 = Point(1, 2) p2 = Point(1, 2) print(p1 == p2) # True print(p1) # Point(x=1, y=2)
3、使用 attr动态定义一个类
import attr Point = attr.make_class("Point", ["x", "y"]) p1 = Point(1, 2) p2 = Point(1, 2) print(p1 == p2) # True print(p1) # Point(x=1, y=2)
4、使用 attr定义一个类
import attr @attr.s class Point(object): x = attr.ib(default=1) # 定义默认参数 y = attr.ib(kw_only=True) # 关键字参数 p1 = Point(1, y=2) p2 = Point(y=2) print(p1 == p2) # True print(p1) # Point(x=1, y=2) print(attr.asdict(p1)) # 转为字典格式 # {'x': 1, 'y': 2}
