Index: Objects/rangeobject.c
===================================================================
RCS file: /cvsroot/python/python/dist/src/Objects/rangeobject.c,v
retrieving revision 2.51
diff -a -u -c -r2.51 rangeobject.c
*** Objects/rangeobject.c	2 Aug 2004 13:22:01 -0000	2.51
--- Objects/rangeobject.c	4 Aug 2004 05:51:35 -0000
***************
*** 141,146 ****
--- 141,180 ----
  	return (int)(r->len);
  }
  
+ static int
+ range_contains(rangeobject *r, PyObject *num)
+ {
+ 	long x = PyInt_AsLong(num) - r->start;
+ 
+ 	if(PyErr_Occurred()) {
+ 		/*not an int.*/
+ 		int retval = 0;
+ 		PyObject *xAsInt;
+ 		long max = r->start + r->len;
+ 
+ 		PyErr_Clear();
+ 
+ 		for(x = r->start; x < max; x += r->step) {
+ 			xAsInt = PyInt_FromLong(x);
+ 			if(PyObject_Compare(xAsInt, num) == 0) {
+ 				retval = 1;
+ 				break;
+ 			}
+ 			Py_DECREF(xAsInt);
+ 		}
+ 
+ 		return retval;
+ 	}
+ 	else {
+ 		return	 ((x / r->step) < r->len) &&
+ 	 	     !(x % r->step) &&
+ 		      (
+ 	 	           (!x) ||
+ 		          ((x < 0) == (r->step < 0))
+ 		      );
+ 	}
+ }
+ 
  static PyObject *
  range_repr(rangeobject *r)
  {
***************
*** 169,174 ****
--- 203,213 ----
  	0,			/* sq_repeat */
  	(intargfunc)range_item, /* sq_item */
  	0,			/* sq_slice */
+ 	0,			/* sq_ass_item */
+ 	0,			/* sq_ass_slice */
+ 	(objobjproc)range_contains,	/* sq_contains */
+ 	0,			/* sq_inplace_concat */
+ 	0,			/* sq_inplace_repeat */
  };
  
  static PyObject * range_iter(PyObject *seq);
Index: Lib/test/test_xrange.py
===================================================================
RCS file: /cvsroot/python/python/dist/src/Lib/test/test_xrange.py,v
retrieving revision 1.1
diff -a -u -c -r1.1 test_xrange.py
*** Lib/test/test_xrange.py	8 Jul 2004 01:59:55 -0000	1.1
--- Lib/test/test_xrange.py	4 Aug 2004 05:51:35 -0000
***************
*** 52,57 ****
--- 52,85 ----
          self.assertRaises(OverflowError, xrange, -sys.maxint, sys.maxint)
          self.assertRaises(OverflowError, xrange, 0, 2*sys.maxint)
  
+         x = xrange(0, sys.maxint)
+         self.assert_(0 in x)
+         self.assert_(sys.maxint not in x)
+         self.assert_((sys.maxint - 1) in x)
+         self.assert_(-1 not in x)
+ 
+         x = xrange(0, 100, 2)
+         self.assert_(0 in x)
+         self.assert_(-1 not in x)
+         self.assert_(-2 not in x)
+         self.assert_(1 not in x)
+         self.assert_(2 in x)
+         self.assert_(3 not in x)
+         self.assert_(100 not in x)
+         self.assert_(99 not in x)
+         self.assert_(98 in x)
+ 
+         x = xrange(0, -100, -2)
+         self.assert_(0 in x)
+         self.assert_(1 not in x)
+         self.assert_(2 not in x)
+         self.assert_(-1 not in x)
+         self.assert_(-2 in x)
+         self.assert_(-3 not in x)
+         self.assert_(-100 not in x)
+         self.assert_(-99 not in x)
+         self.assert_(-98 in x)
+ 
  def test_main():
      test.test_support.run_unittest(XrangeTest)