RE: [Python-Dev] The memo of pickle

The object's id() (address) is the key. Else only hashable objects could be pickled.

Hmmm, I see. It occurs to me that what you really want here is a special kind of dictionary that uses "is" instead of "==" to compare key values. Or is that what was meant by an "identity dictionary"? Greg Ewing, Computer Science Dept, +--------------------------------------+ University of Canterbury, | A citizen of NewZealandCorp, a | Christchurch, New Zealand | wholly-owned subsidiary of USA Inc. | greg@cosc.canterbury.ac.nz +--------------------------------------+