Improvements to set.py:
* Relaxed the argument restrictions for non-operator methods. They now
allow any iterable instead of requiring a set. This makes the module
a little easier to use and paves the way for an efficient C
implementation which can take better advantage of iterable arguments
while screening out immutables.
* Deprecated Set.update() because it now duplicates Set.union_update()
* Adapted the tests and docs to include the above changes.
* Added more test coverage including testing identities and checking
to make sure non-restartable generators work as arguments.
Will backport to Py2.3.1 so that the interface remains consistent
across versions. The deprecation of update() will be changed to
a FutureWarning.
diff --git a/Misc/NEWS b/Misc/NEWS
index a3a62be..8f24d85 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -30,7 +30,10 @@
Library
-------
-- sets.py now runs under Py2.2
+- sets.py now runs under Py2.2. In addition, the argument restrictions
+ for most set methods (but not the operators) have been relaxed to
+ allow any iterable. Also the Set.update() has been deprecated because
+ it duplicates Set.union_update().
- random.seed() with no arguments or None uses time.time() as a default
seed. Modified to match Py2.2 behavior and use fractional seconds so