Re: Save/Store whole class (or another object) in a file

2006-10-25 Thread alexLIGO 
Hi,

Fredrik Lundh wrote:

 [EMAIL PROTECTED] wrote:

  thanks for the reply,but unfortunately this does not work with the type
  of classes I am dealing with. When trying to pickle the class I get the
  following error:
 
   File /usr/lib/python2.4/copy_reg.py, line 76, in _reduce_ex
  raise TypeError(a class that defines __slots__ without 
  TypeError: a class that defines __slots__ without defining __getstate__
  cannot be pickled
 
  So there is something missing in this class?

 did you remember to read the error message before posting ?


of course I read the error-message, I understand the error-message, BUT
this message is not telling me how anyway to save the data of such a
class in a file!  It does not tell me, that there is absolutely no way
to do that. Maybe there is, maybe there is not.
Thats why I am posting it here!

Alex

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Re: Save/Store whole class (or another object) in a file

2006-10-25 Thread Gabriel Genellina 

At Wednesday 25/10/2006 11:32, [EMAIL PROTECTED] wrote:


Fredrik Lundh wrote:
 [EMAIL PROTECTED] wrote:
  thanks for the reply,but unfortunately this does not work with the type
  of classes I am dealing with. When trying to pickle the class I get the
  following error:
 
   File /usr/lib/python2.4/copy_reg.py, line 76, in _reduce_ex
  raise TypeError(a class that defines __slots__ without 
  TypeError: a class that defines __slots__ without defining __getstate__
  cannot be pickled
 
  So there is something missing in this class?

 did you remember to read the error message before posting ?

of course I read the error-message, I understand the error-message, BUT
this message is not telling me how anyway to save the data of such a
class in a file!  It does not tell me, that there is absolutely no way
to do that. Maybe there is, maybe there is not.
Thats why I am posting it here!


A man who wears a hat without buying a ticket cannot enter the theatre
You wear a hat, you want to enter: either buy your ticket or forget 
about your hat.
In this case, just define a __getstate__ method (read the pickle 
docs), or forget about __slots__.



--
Gabriel Genellina
Softlab SRL 


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Re: Save/Store whole class (or another object) in a file

2006-10-18 Thread alexLIGO 
Hi,

thanks for the reply,but unfortunately this does not work with the type
of classes I am dealing with. When trying to pickle the class I get the
following error:

 File /usr/lib/python2.4/copy_reg.py, line 76, in _reduce_ex
raise TypeError(a class that defines __slots__ without 
TypeError: a class that defines __slots__ without defining __getstate__
cannot be pickled

So there is something missing in this class? Or any other idea how to
do this?

Alex


Sybren Stuvel wrote:
 [EMAIL PROTECTED] enlightened us with:
  is it possible in python (with/without matplotlib, numpy etc) to
  store a whole class with its data into a file

 Check out the pickle module.
 
 Sybren
 -- 
 Sybren Stüvel
 Stüvel IT - http://www.stuvel.eu/

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Re: Save/Store whole class (or another object) in a file

2006-10-18 Thread Fredrik Lundh 
[EMAIL PROTECTED] wrote:

 thanks for the reply,but unfortunately this does not work with the type
 of classes I am dealing with. When trying to pickle the class I get the
 following error:

  File /usr/lib/python2.4/copy_reg.py, line 76, in _reduce_ex
 raise TypeError(a class that defines __slots__ without 
 TypeError: a class that defines __slots__ without defining __getstate__
 cannot be pickled

 So there is something missing in this class?

did you remember to read the error message before posting ?

/F 



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Re: Save/Store whole class (or another object) in a file

2006-10-18 Thread Michele Simionato 
[EMAIL PROTECTED] wrote:
 Hi,

 thanks for the reply,but unfortunately this does not work with the type
 of classes I am dealing with. When trying to pickle the class I get the
 following error:

  File /usr/lib/python2.4/copy_reg.py, line 76, in _reduce_ex
 raise TypeError(a class that defines __slots__ without 
 TypeError: a class that defines __slots__ without defining __getstate__
 cannot be pickled

 So there is something missing in this class? Or any other idea how to
 do this?

 Alex

yes, read the documentation:
http://docs.python.org/dev/lib/pickle-inst.html

 Michele Simionato

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Re: Save/Store whole class (or another object) in a file

2006-10-17 Thread Sybren Stuvel 
[EMAIL PROTECTED] enlightened us with:
 is it possible in python (with/without matplotlib, numpy etc) to
 store a whole class with its data into a file

Check out the pickle module.

Sybren
-- 
Sybren Stüvel
Stüvel IT - http://www.stuvel.eu/
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Re: Save/Store whole class (or another object) in a file

2006-10-17 Thread Matimus 
 is it possible in python (with/without matplotlib, numpy etc) to store
 a whole class with its data into a file, instead it to reconstruct
 every time again? So is there an analogous to the matlab functions
 load/save available?

look up the pickle module.

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