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authorerick <erick@sugar-dev-erick.(none)>2009-12-05 20:42:51 (GMT)
committer erick <erick@sugar-dev-erick.(none)>2009-12-05 20:42:51 (GMT)
commit0e6a6e03c520b86ee36d79d4cd0daf06f84632a3 (patch)
treec7bf9600b516f2a7aa466c9b13555898e28cb924 /tutorius/properties.py
parentda7f320dc609e744817c311652d82f5ae1113736 (diff)
parentd47b1b969caad10673fb3763a861d202a01bee53 (diff)
Merge branch 'master' of git://git.sugarlabs.org/tutorius/mainline into frame_integrationframe_integration
Diffstat (limited to 'tutorius/properties.py')
-rw-r--r--tutorius/properties.py24
1 files changed, 23 insertions, 1 deletions
diff --git a/tutorius/properties.py b/tutorius/properties.py
index f273569..07b1645 100644
--- a/tutorius/properties.py
+++ b/tutorius/properties.py
@@ -138,7 +138,29 @@ class TPropContainer(object):
"""
Return a deep copy of the dictionary of properties from that object.
"""
- return deepcopy(self._props)
+ return deepcopy(self._props)
+
+ def __hash__(self):
+ """
+ Deprecated.
+
+ Property containers should not be used as keys inside dictionary for
+ the time being. Since containers are mutable, we should definitely
+ use the addressing mechanism to refer to the containers.
+ """
+ # Many places we use containers as keys to store additional data.
+ # Since containers are mutable, there is a need for a hash function
+ # where the result is constant, so we can still lookup old instances.
+ return self.__id
+
+ # Adding methods for pickling and unpickling an object with
+ # properties
+ def __getstate__(self):
+ return dict(id=self.__id, props=self._props.copy())
+
+ def __setstate__(self, dict):
+ self.__id = dict['id']
+ self._props.update(dict['props'])
def __eq__(self, e2):
return (isinstance(e2, type(self)) and self._props == e2._props)