Backport 69934: Register xrange() as a Sequence.

Lib/_abcoll.py

@@ -519,6 +519,7 @@ class Sequence(Sized, Iterable, Container):
 Sequence.register(tuple)
 Sequence.register(basestring)
 Sequence.register(buffer)
+Sequence.register(xrange)
 
 
 class MutableSequence(Sequence):

Lib/test/test_collections.py

@@ -393,6 +393,9 @@ class TestCollectionABCs(ABCTestCase):
             self.failUnless(isinstance(sample(), Sequence))
             self.failUnless(issubclass(sample, Sequence))
         self.failUnless(issubclass(basestring, Sequence))
+        self.failUnless(isinstance(range(10), Sequence))
+        self.failUnless(issubclass(xrange, Sequence))
+        self.failUnless(issubclass(str, Sequence))
         self.validate_abstract_methods(Sequence, '__contains__', '__iter__', '__len__',
             '__getitem__')
 

Misc/NEWS

@@ -12,6 +12,8 @@ What's New in Python 2.6.2
 Core and Builtins
 -----------------
 
+- xrange() is now registered as a Sequence.
+
 - Issue #5247: Improve error message when unknown format codes are
   used when using str.format() with str, unicode, long, int, and
   float arguments.