Add a bit more typing

sagemath · Feb 2, 2021 · 5364cd6 · 5364cd6
1 parent d74f6c9
commit 5364cd6
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Showing 2 changed files with 5 additions and 2 deletions.
diff --git a/src/sage/manifolds/differentiable/manifold.py b/src/sage/manifolds/differentiable/manifold.py
@@ -449,13 +449,15 @@
 from sage.rings.integer import Integer
 from sage.manifolds.manifold import TopologicalManifold
 from sage.manifolds.differentiable.mixed_form_algebra import MixedFormAlgebra
+from sage.manifolds.differentiable.vectorframe import VectorFrame
 
 from typing import Optional, Union, TYPE_CHECKING
 if TYPE_CHECKING:
     from sage.manifolds.differentiable.vectorfield_module import VectorFieldFreeModule, VectorFieldModule
 
 ###############################################################################
 
+
 class DifferentiableManifold(TopologicalManifold):
     r"""
     Differentiable manifold over a topological field `K`.
@@ -2960,7 +2962,7 @@ def set_change_of_frame(self, frame1, frame2, change_of_frame,
                 for sdom in self._supersets:
                     sdom._frame_changes[(frame2, frame1)] = change_of_frame.inverse()
 
-    def vector_frame(self, *args, **kwargs):
+    def vector_frame(self, *args, **kwargs) -> VectorFrame:
         r"""
         Define a vector frame on ``self``.
 

diff --git a/src/sage/manifolds/differentiable/vectorframe.py b/src/sage/manifolds/differentiable/vectorframe.py
@@ -462,7 +462,8 @@ def set_name(self, symbol, latex_symbol=None, indices=None,
             self._latex_name = r"\left({}, {}\right)".format(
                                     self._domain._latex_name, self._latex_name)
 
-#******************************************************************************
+# ******************************************************************************
+
 
 class VectorFrame(FreeModuleBasis):
     r"""