[Tutor] TimeOut in

[OkaMthembo]

Hi Somnath,

I think the exception simply means that the thread object or class does not
have a cancel function. maybe read docs on Python threads to see what
functions can be called on those?

On Sun, Nov 8, 2009 at 9:09 PM, somnath chakrabarti <
chakrabarti.somnath at gmail.com> wrote:

> Hi Alan,
>
> I am importing the constraint library package in the beginning that is
> having classes Problem, Solver and all the methods that I am calling. Now,
> as you said after making the change from
>
>         self.p = threading.Timer(100, self.onTimeout)
>
> I am getting the below error. I am also attaching the constraint.py
> package that my code is using
>
> - Somnath
>
>
> %%%%%%% Error Message %%%%%%%%%%%%%%%%%%%%
>
> <constraint.BacktrackingSolver object at 0x02846F10>
> Magic Square:
>
> Exception in thread Thread-1:
> Traceback (most recent call last):
>   File "C:\Python26\lib\threading.py", line 525, in __bootstrap_inner
>     self.run()
>   File "C:\Python26\lib\threading.py", line 477, in run
>     self.__target(*self.__args, **self.__kwargs)
>   File "C:\Users\Somnath\Documents\NetBeansProjects\CSC671\src\ms_t.py",
> line 43, in getSolution
>
>     self.solution=Problem.getSolution(self)
>   File
> "C:\Users\Somnath\Documents\NetBeansProjects\CSC671\src\constraint.py", line
> 215, in getSolution
>     return self._solver.getSolution(domains, constraints, vconstraints)
>   File
> "C:\Users\Somnath\Documents\NetBeansProjects\CSC671\src\constraint.py", line
> 524, in getSolution
>     return iter.next()
>   File
> "C:\Users\Somnath\Documents\NetBeansProjects\CSC671\src\constraint.py", line
> 506, in getSolutionIter
>     pushdomains):
>   File
> "C:\Users\Somnath\Documents\NetBeansProjects\CSC671\src\constraint.py", line
> 1173, in __call__
>     domain.hideValue(value)
>   File
> "C:\Users\Somnath\Documents\NetBeansProjects\CSC671\src\constraint.py", line
> 787, in hideValue
>     list.remove(self, value)
> ValueError: list.remove(x): x not in list
> None
> Time taken: 0.047
>
> Traceback (most recent call last):
>   File "C:\Users\Somnath\Documents\NetBeansProjects\CSC671\src\csc671.py",
> line 125, in <module>
>     ms_t.magic_square(size,func_solver())
>   File "C:\Users\Somnath\Documents\NetBeansProjects\CSC671\src\ms_t.py",
> line 68, in magic_square
>     t.cancel()
> AttributeError: 'Thread' object has no attribute 'cancel'
> None
> Time Exceeded Limit.
>
>
> On Sun, Nov 8, 2009 at 12:17 PM, Alan Gauld <alan.gauld at btinternet.com>wrote:
>
>>
>> "somnath chakrabarti" <chakrabarti.somnath at gmail.com> wrote
>>
>>
>> Below is the code that I have written to do the timeout implementation.
>>> But
>>> I am getting error as follows. Can anybody please help me where I am
>>> going
>>> wrong?
>>>
>>
>> I have no idea how this framework is upposed to work but my
>> guess is that the problem lies here:
>>
>>
>>   def getSolution(self,solver):
>>>       Problem.setSolver(self,solver)
>>>       self.p = threading.Timer(100, self.onTimeout())
>>>
>>
>> Thios looks like you should be providing a callback
>> function self.onTimeout but you are calling the function
>> instead of referencing it. This calls the method before
>> self.p has been defined.
>>
>> You need to remove the parentheses after Timeout.
>>
>> I think...
>>
>> --
>> Alan Gauld
>> Author of the Learn to Program web site
>> http://www.alan-g.me.uk/
>>
>> _______________________________________________
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>
>
>
> --
> Thanks and regards,
> Somnath Chakrabarti.
>
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>


-- 
Regards,
Lloyd
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