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From: jmp <jeanmichel@sequans.com>
Subject: Re: Question re class variable
Date: Tue, 29 Sep 2015 13:11:15 +0200
References: <3948d9cd-24b1-4a3b-8ed0-46bb60a8d738@googlegroups.com> <mudr3k$soh$1@ger.gmane.org>
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Xref: csiph.com comp.lang.python:97203

On 09/29/2015 01:02 PM, jmp wrote:
> class GameObject:
>
>    @property
>    def id(self):
>      return id(self) #use the builtin id function
>
> print GameObject().id
>
> Cheers,
>
> JM

I should add that until you don't serialize your object you're fine.

If you need to serialize it, you may want to look at 
https://docs.python.org/3/library/uuid.html

import uuid

class GameObject:

   def __init__(self):
     self._id = None

   @property
   def id(self):
     if self._id is None:
       # make a UUID based on the host ID and current time
       self._id = uuid.uuid1()
     return self._id