add type annotations to gens methods

Author: fchapoton

src/sage/categories/examples/finite_dimensional_lie_algebras_with_basis.py

@@ -242,7 +242,7 @@ def basis(self):
 
     lie_algebra_generators = basis
 
-    def gens(self):
+    def gens(self) -> tuple:
         """
         Return the generators of ``self``.
 

src/sage/categories/finite_dimensional_modules_with_basis.py

@@ -36,7 +36,7 @@ class FiniteDimensionalModulesWithBasis(CategoryWithAxiom_over_base_ring):
 
     class ParentMethods:
 
-        def gens(self):
+        def gens(self) -> tuple:
             """
             Return the generators of ``self``.
 

src/sage/categories/pushout.py

@@ -3797,7 +3797,7 @@ def __call__(self, R):
         return PermutationGroup([g for g in (R.gens() + self.gens()) if not g.is_one()],
                                 domain=self._domain)
 
-    def gens(self):
+    def gens(self) -> tuple:
         """
         EXAMPLES::
 

src/sage/categories/semigroups.py

@@ -906,7 +906,7 @@ def algebra_generators(self):
             # gens / monoid/group/*_generators, these methods could possibly
             # be removed in favor of aliases gens -> xxx_generators in
             # the Algebras.FinitelyGenerated hierarchy
-            def gens(self):
+            def gens(self) -> tuple:
                 r"""
                 Return the generators of ``self``.
 

src/sage/coding/linear_code_no_metric.py

@@ -373,7 +373,7 @@ def rate(self):
         return self.dimension() / self.length()
 
     @cached_method
-    def gens(self):
+    def gens(self) -> list:
         r"""
         Return the generators of this code as a list of vectors.
 

src/sage/combinat/colored_permutations.py

@@ -651,7 +651,7 @@ def _inverse_simple_reflections(self):
         return {i: ~s[i] for i in self.index_set()}
 
     @cached_method
-    def gens(self):
+    def gens(self) -> tuple:
         """
         Return the generators of ``self``.
 

src/sage/combinat/free_dendriform_algebra.py

@@ -285,7 +285,7 @@ def change_ring(self, R):
         """
         return FreeDendriformAlgebra(R, names=self.variable_names())
 
-    def gens(self):
+    def gens(self) -> tuple:
         """
         Return the generators of ``self`` (as an algebra).
 

src/sage/combinat/free_prelie_algebra.py

@@ -348,7 +348,7 @@ def change_ring(self, R):
         """
         return FreePreLieAlgebra(R, names=self.variable_names())
 
-    def gens(self):
+    def gens(self) -> tuple:
         """
         Return the generators of ``self`` (as an algebra).
 

src/sage/geometry/hyperplane_arrangement/arrangement.py

@@ -3851,7 +3851,7 @@ def ngens(self):
         return len(self._names)
 
     @cached_method
-    def gens(self):
+    def gens(self) -> tuple:
         """
         Return the coordinate hyperplanes.
 

src/sage/geometry/linear_expression.py

@@ -534,7 +534,7 @@ def ngens(self):
         return len(self._names)
 
     @cached_method
-    def gens(self):
+    def gens(self) -> tuple:
         """
         Return the generators of ``self``.