a few more yield from

Author: fchapoton

src/sage/combinat/non_decreasing_parking_function.py

@@ -419,8 +419,7 @@ def __iter__(self):
             [[], [1], [1, 1], [1, 2], [1, 1, 1], [1, 1, 2], [1, 1, 3], [1, 2, 2]]
         """
         for n in NN:
-            for pf in NonDecreasingParkingFunctions_n(n):
-                yield pf
+            yield from NonDecreasingParkingFunctions_n(n)
 
     def graded_component(self, n):
         """

src/sage/combinat/species/functorial_composition_species.py

@@ -71,8 +71,7 @@ def _structures(self, structure_class, s):
              {{1, 2}*{3}, {1, 3}*{2}, {2, 3}*{1}}]
         """
         gs = self._G.structures(s).list()
-        for f in self._F.structures(gs):
-            yield f
+        yield from self._F.structures(gs)
 
     def _isotypes(self, structure_class, s):
         """

src/sage/combinat/subset.py

@@ -1130,8 +1130,7 @@ def __iter__(self):
              [1, 2, 2, 3]]
         """
         for k in range(len(self._l) + 1):
-            for s in SubMultiset_sk(self._l, k):
-                yield s
+            yield from SubMultiset_sk(self._l, k)
 
     def __call__(self, el):
         r"""

src/sage/graphs/digraph_generators.py

@@ -1747,8 +1747,7 @@ def extra_property(x):
             if vertices is None:
                 vertices = 0
                 while True:
-                    for g in self(vertices, sparse=sparse, copy=copy):
-                        yield g
+                    yield from self(vertices, sparse=sparse, copy=copy)
                     vertices += 1
 
             from sage.graphs.graph_generators import canaug_traverse_edge

src/sage/modular/multiple_zeta.py

@@ -575,8 +575,7 @@ def extend_multiplicative_basis(B, n) -> Iterator:
         [((7,),), ((5,), (2,)), ((3,), (2,), (2,))]
     """
     for pi in Partitions(n, min_part=2):
-        for liste in cartesian_product([B[i] for i in pi]):
-            yield liste
+        yield from cartesian_product([B[i] for i in pi])
 
 
 # several classes for the algebra of MZV

src/sage/rings/polynomial/groebner_fan.py

@@ -1157,8 +1157,7 @@ def __iter__(self):
             sage: next(a)
             [y^9 - 3*y^6 + 3*y^3 - y - 1, -y^3 + x + 1]
         """
-        for x in self.reduced_groebner_bases():
-            yield x
+        yield from self.reduced_groebner_bases()
 
     def __getitem__(self, i):
         """

src/sage/schemes/toric/points.py

@@ -350,8 +350,7 @@ def cone_iter(self):
         """
         fan = self.fan
         for d in range(fan.dim(), -1, -1):
-            for cone in fan.cones(d):
-                yield cone
+            yield from fan.cones(d)
 
     def coordinate_iter(self):
         """