Removed < <= > >= from the API. Implemented as comparisons of the

underlying dictionaries, there were no reasonable use cases (lexicographic
sorting of a list of sets is somewhat esoteric).  Frees the operators
for other uses (such as strict subset and superset comparisons).

Updated documentation and test suite accordingly.

2 files changed, 3 insertions, 20 deletions

diff --git a/Lib/sets.py b/Lib/sets.py
index 09d9918..d422591 100644
--- a/Lib/sets.py
+++ b/Lib/sets.py
@@ -102,16 +102,7 @@ class BaseSet(object):
         """
         return self._data.iterkeys()
 
-    # Comparisons.  Ordering is determined by the ordering of the
-    # underlying dicts (which is consistent though unpredictable).
-
-    def __lt__(self, other):
-        self._binary_sanity_check(other)
-        return self._data < other._data
-
-    def __le__(self, other):
-        self._binary_sanity_check(other)
-        return self._data <= other._data
+    # Equality comparisons using the underlying dicts
 
     def __eq__(self, other):
         self._binary_sanity_check(other)
@@ -121,14 +112,6 @@ class BaseSet(object):
         self._binary_sanity_check(other)
         return self._data != other._data
 
-    def __gt__(self, other):
-        self._binary_sanity_check(other)
-        return self._data > other._data
-
-    def __ge__(self, other):
-        self._binary_sanity_check(other)
-        return self._data >= other._data
-
     # Copying operations
 
     def copy(self):
diff --git a/Lib/test/test_sets.py b/Lib/test/test_sets.py
index 9ff98a6..65b48e2 100644
--- a/Lib/test/test_sets.py
+++ b/Lib/test/test_sets.py
@@ -419,12 +419,12 @@ class TestOnlySetsInBinaryOps(unittest.TestCase):
 
     def test_cmp(self):
         try:
-            self.other < self.set
+            self.other == self.set
             assert 0, "Comparison with non-set on left"
         except TypeError:
             pass
         try:
-            self.set >= self.other
+            self.set != self.other
             assert 0, "Comparison with non-set on right"
         except TypeError:
             pass