我有这个代码;
class NumberDescriptor(object):
def __get__(self, instance, owner):
name = (hasattr(self, "name") and self.name)
if not name:
name = [attr for attr in dir(owner) if getattr(owner,attr) is self][0]
self.name = name
return getattr(instance, '_' + name)
def __set__(self,instance, value):
name = (hasattr(self, "name") and self.name)
if not name:
owner = type(instance)
name = [attr for attr in dir(owner) if getattr(owner,attr) is self][0]
self.name = name
setattr(instance, '_' + name, int(value))
class Insan(object):
yas = NumberDescriptor()
a = Insan()
print a.yas
a.yas = "osman"
print a.yas
我在行 name = [attr for attr in dir(owner) if getattr(owner,attr) is self][0]
中遇到最大递归深度错误。我希望该行获取用于当前描述符实例的变量名称。谁能看出我在这里做错了什么?
最佳答案
getattr()
调用正在调用您的 __get__
。
解决此问题的一种方法是显式调用父类(super class) object
:
object.__getattribute__(instance, name)
或者,更清楚:
instance.__dict__[name]
关于python - getattr 的最大递归深度错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/12163476/