On Nov 22, 2007 9:54 AM, Gary Thompson <garyt@xxxxxxxxxxxxxxx> wrote:
Edward d'Auvergne wrote:
Chris and Gary,
Remember a long way back we had discussions about the following concept:
-----
class Data(dict):
"""The relax data storage object."""
[snip]
# Rebind the name Data with an instance to prevent accidental creation
# of multiple instances of the Data class
Data = Data()
-----
[snip]
Can you give some details of how it fails? Is there an exception or does
it just replace the Data sinleton instance with a class instance?
Anyway i will dig further later in the week
This can be seen by running the unit tests. Just edit the file
data/__init__.py which contains the singleton and raname both
instances of Data2 to Data. Then the unit test will give the relevent
message:
======================================================================
ERROR: The pickling and saving of the relax data storage singleton.
----------------------------------------------------------------------
Traceback (most recent call last):
File
"/nmr5/edau/relax/relax-1.3/test_suite/unit_tests/state_testing_base.py",
line 100, in test_save
self.state.save_state(file='test')
File "/nmr5/edau/relax/relax-1.3/prompt/state.py", line 178, in save
save_state(file=file, dir=dir, force=force, compress_type=compress_type)
File "/nmr5/edau/relax/relax-1.3/generic_fns/state.py", line 77, in
save_state
dump(relax_data_store, file, 1)
PicklingError: Can't pickle <class 'data.Data'>: it's not the same
object as data.Data
======================================================================
This looks like a possible namespace issue. Maybe???
regards
gary
Of course one of the points here is that this isn't the only way to
write a singleton ;-)
Of course, but I think we should still go with the way we voted. We
just need to work out how to pickle this thing.
Cheers,
Edward
--
Edward d'Auvergne
Website: http://nmr-relax.com
Profile: https://gna.org/users/bugman
Re: Pickling problems with the relax data storage singleton.