一、概念
- property属性是一种特殊的装饰器,用于将方法转换为属性。
二、作用
- 它通常与@property装饰器一起使用,以便在获取和设置属性值时执行一些额外的操作。
三、实战
class Person:
def __init__(self, name, age):
self._name = name
self._age = age
@property
def name(self):
return self._name
@name.setter
def name(self, value):
if not isinstance(value, str):
raise ValueError("姓名必须是字符串类型")
self._name = value
@property
def age(self):
return self._age
@age.setter
def age(self, value):
if not isinstance(value, int):
raise ValueError("年龄必须是整数类型")
if value < 0:
raise ValueError("年龄不能为负数")
self._age = value
p = Person("张三", 25)
print(p.name)
print(p.age)
p.name = "李四"
p.age = 30
print(p.name)
print(p.age)
四、小结
- setter属性通常需要和property一起使用,否则会提示错误。
- property属性列表
def deleter(self, *args, **kwargs):
""" Descriptor to change the deleter on a property. """
pass
def getter(self, *args, **kwargs):
""" Descriptor to change the getter on a property. """
pass
def setter(self, *args, **kwargs):
""" Descriptor to change the setter on a property. """
pass