[PYTHON MATRIX-SIG] Pickling arrays

[Jim Fulton]

Konrad Hinsen wrote:
> 
> Recently seen on my computer screen:
> 
> Traceback (innermost last):
>   File "<stdin>", line 1, in ?
>   File "/usr/tmp/pythona05330", line 42, in ?
>     pickle.dump(h, file)
>   File "/usr/local/lib/python1.4/pickle.py", line 547, in dump
>     Pickler(file).dump(object)
>   File "/usr/local/lib/python1.4/pickle.py", line 189, in dump
>     self.save(object)
>   File "/usr/local/lib/python1.4/pickle.py", line 208, in save
>     raise PicklingError, \
> pickle.PicklingError: can't pickle 'array' objects
> 
> Didn't this work at some point? 

Not without a modified pickle module.

> Should it work? Should I do something
> else?

The pickle module in 1.4 will allow built-in objects that
behave like instances to be pickled.  Objects must have a
__class__ attribute that is bound to a callable object that
is not a python or C function.

In a couple of weeks I will release an "Extension Class"
module that will, among other things, facilitate building 
built-in types that behave like classes and whos instances
behave like python instances.  In particular, built-in 
instances based on extension classes will be picklable.

The primary benefit of extension classes is that they
can be subclassed in Python.

Jim

-- 
Jim Fulton         Digital Creations
jim@digicool.com   540.371.6909
## Python is my favorite language ##
##     http://www.python.org/     ##

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