Make sets.py compatible with Py2.2
diff --git a/Lib/sets.py b/Lib/sets.py
index ebe62c6..32eb0aa 100644
--- a/Lib/sets.py
+++ b/Lib/sets.py
@@ -54,9 +54,27 @@
# - Raymond Hettinger added a number of speedups and other
# improvements.
+from __future__ import generators
+try:
+ from itertools import ifilter, ifilterfalse
+except ImportError:
+ # Code to make the module run under Py2.2
+ def ifilter(predicate, iterable):
+ if predicate is None:
+ def predicate(x):
+ return x
+ for x in iterable:
+ if predicate(x):
+ yield x
+ def ifilterfalse(predicate, iterable):
+ if predicate is None:
+ def predicate(x):
+ return x
+ for x in iterable:
+ if not predicate(x):
+ yield x
__all__ = ['BaseSet', 'Set', 'ImmutableSet']
-from itertools import ifilter, ifilterfalse
class BaseSet(object):
"""Common base class for mutable and immutable sets."""
diff --git a/Misc/NEWS b/Misc/NEWS
index 63827d2..a3a62be 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -30,6 +30,8 @@
Library
-------
+- sets.py now runs under Py2.2
+
- 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
that successive runs are more likely to produce different sequences.