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Groups > comp.lang.python > #64525

Re: Self healthcheck

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 Asaf Las <roegltd@gmail.com> Wrote in message:
> On Wednesday, January 22, 2014 10:56:30 AM UTC+2, Frank Millman wrote:
>> 
>> class MainObject:
>>     def __init__(self, identifier):
>>          self._del = delwatcher('MainObject', identifier)
>> class delwatcher:
>>     def __init__(self, obj_type, identifier):
>>         self.obj_type = obj_type
>>         self.identifier = identifier
>>         log('{}: id={} created'.format(self.obj_type, self.identifier))
>>     def __del__(self):
>>         log('{}: id={} deleted'.format(self.obj_type, self.identifier))
>> If you do find that an object is not being deleted, it is then 
>> trial-and-error to find the problem and fix it. It is probably a circular 
>> reference
>> 
>> Frank Millman
> 
> Thanks Frank. Good approach! 
> 
> One question - You could do:
> class MainObject:
>     def __init__(self, identifier):
>          self._del = delwatcher(self)
> then later 
> 
> class delwatcher:
>     def __init__(self, tobject):
>         self.obj_type = type(tobject)
>         self.identifier = id(tobject)
>         ...
> 
> when creating delwatcher. Was there special reason to not to use them?
> is this because of memory is reused when objects are deleted 
> and created again so same reference could be for objects created 
> in different time slots?
> 

I couldn't make sense of most of that.  But an ID only uniquely
 corresponds to an object while that object still exists.  The
 system may,  and will, reuse iD's constantly. 

-- 
DaveA

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Self healthcheck Asaf Las <roegltd@gmail.com> - 2014-01-21 18:51 -0800
  Re: Self healthcheck Chris Angelico <rosuav@gmail.com> - 2014-01-22 14:08 +1100
    Re: Self healthcheck Asaf Las <roegltd@gmail.com> - 2014-01-22 00:18 -0800
      Re: Self healthcheck Nicholas Cole <nicholas.cole@gmail.com> - 2014-01-22 08:43 +0000
        Re: Self healthcheck Asaf Las <roegltd@gmail.com> - 2014-01-22 07:51 -0800
      Re: Self healthcheck "Frank Millman" <frank@chagford.com> - 2014-01-22 10:56 +0200
        Re: Self healthcheck Asaf Las <roegltd@gmail.com> - 2014-01-22 08:03 -0800
          Re: Self healthcheck Dave Angel <davea@davea.name> - 2014-01-22 13:40 -0500
          Re: Self healthcheck "Frank Millman" <frank@chagford.com> - 2014-01-23 07:36 +0200

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