Python 未调用属性装饰器的setter方法
我尝试使用属性方法设置类实例的状态,并使用以下类定义:Python 未调用属性装饰器的setter方法,python,class,properties,decorator,python-decorators,Python,Class,Properties,Decorator,Python Decorators,我尝试使用属性方法设置类实例的状态,并使用以下类定义: class Result: def __init__(self,x=None,y=None): self.x = float(x) self.y = float(y) self._visible = False self._status = "You can't see me" @property def visible(self):
class Result:
def __init__(self,x=None,y=None):
self.x = float(x)
self.y = float(y)
self._visible = False
self._status = "You can't see me"
@property
def visible(self):
return self._visible
@visible.setter
def visible(self,value):
if value == True:
if self.x is not None and self.y is not None:
self._visible = True
self._status = "You can see me!"
else:
self._visible = False
raise ValueError("Can't show marker without x and y coordinates.")
else:
self._visible = False
self._status = "You can't see me"
def currentStatus(self):
return self._status
但是,从结果来看,似乎没有执行setter方法,尽管内部变量正在更改:
>>> res = Result(5,6)
>>> res.visible
False
>>> res.currentStatus()
"You can't see me"
>>> res.visible = True
>>> res.visible
True
>>> res.currentStatus()
"You can't see me"
我做错了什么?在Python 2上,必须从对象继承属性才能工作:
class Result(object):
使之成为一门新型的课程。通过该更改,您的代码可以正常工作:
>>> res = Result(5,6)
>>> res.visible
False
>>> res.visible = True
>>> res.currentStatus()
'You can see me!'