Is it possible to save a running program and reload next time ?

[fdu.xiaojf at gmail.com]

Hans Georg Krauthaeuser wrote:
> fdu.xiaojf at gmail.com wrote:
>   
>> Hans Georg Krauthaeuser wrote:
>>     
>>> fdu.xiaojf at gmail.com wrote:
>>>  
>>>       
>>>> Can objects be saved and reloaded by "Pickle"  ?  I have tried but no
>>>> success.
>>>>
>>>>     
>>>>         
>>> Yes, that's the intended use of pickle/cPickle. There are examples in
>>> the docs:
>>>
>>> http://docs.python.org/lib/module-pickle.html
>>>
>>> What have you tried and what didn't work?
>>>
>>> Hans Georg
>>>   
>>>       
>> My program is a genetic algorithm based program, so I thought I just
>> need to save a generation object of the population and reload it later
>> then my program could continue. But after I saved a generation object
>> from within python using cPickle and reload it from another program, it
>> said that some class object couldn't be found. Now I realized that a
>> program cannot be suspended and reloaded by just simply dumping and
>> loading using cPickle/Pickle.
>>
>> I will try stackless python later.
>>
>> Thanks a lot .
>>
>> Regards,
>>
>> xiaojf
>>
>>     
> I use pickle to periodically save measured data for measurements that
> take several days to finish. Actually, I save a class instance with the
> data, the measurement methods and additional informations what method
> was called and with what parameters. If the measurement crashes due to
> some reasons, I recreate the class instance from the pickle file, call
> the appropriate method with the saved parameters. Then, the method has
> to look what data is already there and will continue to measure the rest.
>
> I have no idea whether that will help you in your situation.
>
> Anyway, I wish you all the best.
>
> Hans Georg
>   
I just realized another serious problem.

Random values are extensively used in my program, so the program may 
probably not continue to run from an absolutely identical state where it 
stopped. 

Can the state of the random value generator be saved ?

Regards,

xiaojf