Aaron Brady wrote:
I thought of another way Python's passing method could be implemented. Parameters are passed as namespace-name pairs, and every time a variable occurs, it's looked up in the namespace it's in. If it's changed (concurrently) in the outer scope, a copy is made into the inner scope. If it's changed in the inner scope, a new entry is added there.
That sounds like a kind of copy-on-write. It's certainly not call-by-value by any sane interpretation (contrary to your assertion that "all calling is call-by-value"). -- Greg -- http://mail.python.org/mailman/listinfo/python-list
