What I need to know is how I can trick pickle or Numpy to
put the old class into the new class.
If you have an example data-file, send it to me off-list and I'll figure out what to do. Maybe it is as simple as
np.core.ma = np.oldnumeric.ma
Yes, pretty much. We've put ma.py into numpy.core where ma.py is nothing more than:
import numpy.oldnumeric.ma as ma
class MaskedArray(ma.MaskedArray): pass
It works, but becomes a bit of a headache because we now have to maintain our own numpy package so that all the developers get these three lines when they install numpy.
Anyway, it lets us unpickle/unshelve the old data files with 1.1.0. The next step is to transition on the fly the old numpy.core.ma.MaskedArray classes to numpy.ma.core.MaskedArray classes so that when oldnumeric gets depreciated we're not stuck.
Thanks for the input, Anthony.