CODEWITHSUNDEEP
pythonproperties
michaeluskov
michaeluskov

Reputation: 1828

Python: get value of property

I have this Python 2 code:

class VKHandshakeChecker:

    def __getAnswers(self):
        return self.__answers

    def __getStatus(self):
        return self.__status    

    def __init__(self,vkapi,maxDepth=6):
        isinstance(vkapi,VKApi.VKApi)
        self.vkapi = vkapi
        self.__maxDepth=maxDepth
        self.__answers = list()
        self.__status = 'IDLE'
        self.status = property(VKHandshakeChecker.__getStatus)
        self.answers = property(VKHandshakeChecker.__getAnswers)

I want to get answers property. But when I execute this code:

checker = VKHandshakeChecker.VKHandshakeChecker(api)
print(checker.status)

I get <property object at 0x02B55450>, not IDLE. Why?

Upvotes: 1

Views: 4939

Answers (1)

Martijn Pieters
Martijn Pieters

Reputation: 1121216

You can't put descriptors (like a property object) on the instance. You have to use them on the class.

Simply use property as a decorator:

class VKHandshakeChecker:
    @property
    def answers(self):
        return self.__answers

    @property
    def status(self):
        return self.__status    

    def __init__(self,vkapi,maxDepth=6):
        self.vkapi = vkapi
        self.__maxDepth=maxDepth
        self.__answers = list()
        self.__status = 'IDLE'

I removed the isinstance() expression, it doesn't do anything as you are ignoring the return value of the function call.

Upvotes: 5

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