trac #10534: fix pickling

src/sage/combinat/combination.py

@@ -463,3 +463,28 @@ def rank(self, x):
         """
         x = map(self.mset.index, x)
         return rank(x, len(self.mset))
+
+
+##########################################################
+# Deprecations
+
+class ChooseNK(Combinations_setk):
+    def __setstate__(self, state):
+        r"""
+        For unpickling old ``ChooseNK`` objects.
+
+        TESTS::
+
+            sage: loads("x\x9ck`J.NLO\xd5K\xce\xcfM\xca\xccK,\xd1K\xce\xc8\xcf"
+            ....:   "/N\x8d\xcf\xcb\xe6r\x06\xb3\xfc\xbc\xb9\n\x195\x1b\x0b"
+            ....:   "\x99j\x0b\x995B\x99\xe2\xf3\nY :\x8a2\xf3\xd2\x8b\xf52"
+            ....:   "\xf3JR\xd3S\x8b\xb8r\x13\xb3S\xe3a\x9cB\xd6PF\xd3\xd6\xa0"
+            ....:   "B6\xa0\xfa\xecB\xf6\x0c \xd7\x08\xc8\xe5(M\xd2\x03\x00{"
+            ....:   "\x82$\xd8")
+            Combinations of [0, 1, 2, 3, 4] of length 2
+        """
+        self.__class__ = Combinations_setk
+        Combinations_setk.__init__(self, range(state['_n']), state['_k'])
+
+from sage.structure.sage_object import register_unpickle_override
+register_unpickle_override("sage.combinat.choose_nk", "ChooseNK", ChooseNK)

src/sage/combinat/set_partition_ordered.py

@@ -575,3 +575,30 @@ def __iter__(self):
             res = Word(x).standard_permutation().inverse()
             res = [lset[x-1] for x in res]
             yield self.element_class( self, [ Set( res[dcomp[i]+1:dcomp[i+1]+1] ) for i in range(l)] )
+
+##########################################################
+# Deprecations
+
+class SplitNK(OrderedSetPartitions_scomp):
+    def __setstate__(self, state):
+        r"""
+        For unpickling old ``SplitNK`` objects.
+
+        TESTS::
+
+            sage: loads("x\x9ck`J.NLO\xd5K\xce\xcfM\xca\xccK,\xd1+.\xc8\xc9,"
+            ....:   "\x89\xcf\xcb\xe6\n\x061\xfc\xbcA\xccBF\xcd\xc6B\xa6\xda"
+            ....:   "Bf\x8dP\xa6\xf8\xbcB\x16\x88\x96\xa2\xcc\xbc\xf4b\xbd\xcc"
+            ....:   "\xbc\x92\xd4\xf4\xd4\"\xae\xdc\xc4\xec\xd4x\x18\xa7\x905"
+            ....:   "\x94\xd1\xb45\xa8\x90\r\xa8>\xbb\x90=\x03\xc85\x02r9J\x93"
+            ....:   "\xf4\x00\xb4\xc6%f")
+            Ordered set partitions of {0, 1, 2, 3, 4} into parts of size [2, 3]
+        """
+        self.__class__ = OrderedSetPartitions_scomp
+        n = state['_n']
+        k = state['_k']
+        OrderedSetPartitions_scomp.__init__(self, range(state['_n']), (k,n-k))
+
+from sage.structure.sage_object import register_unpickle_override
+register_unpickle_override("sage.combinat.split_nk", "SplitNK_nk", SplitNK)
+