def __getstate__ ( self ):
state = super( NumericContext, self ).__getstate__()
# Save non-transient traits (Traits 2.1 will do this for us):
for k in HasTraits.get( self, transient = True ):
if k in state:
del state[ k ]
# Filter out any unpickleable data from the context dictionary:
if 'context_data' in state:
state[ 'context_data' ] = state[ 'context_data' ].copy()
for k, v in state[ 'context_data' ].items():
if isinstance( v, NonPickleable ):
del state[ 'context_data' ][k]
# Return the saveable state:
state[ '__numeric_context_version__' ] = 1
return state
