code: def mesh_surface_area(mesh=None, verts=None, faces=None):
      r
      if mesh:
          verts = mesh.verts
          faces = mesh.faces
      else:
          if (verts is None) or (faces is None):
              raise Exception('Either mesh or verts and faces must be given')
      surface_area = measure.mesh_surface_area(verts, faces)
      return surface_area
docs: r"""
      Calculates the surface area of a meshed region
  
      Parameters
      ----------
      mesh : tuple
          The tuple returned from the ``mesh_region`` function
      verts : array
          An N-by-ND array containing the coordinates of each mesh vertex
      faces : array
          An N-by-ND array indicating which elements in ``verts`` form a mesh
          element.
  
      Returns
      -------
      surface_area : float
          The surface area of the mesh, calculated by
          ``skimage.measure.mesh_surface_area``
  
      Notes
      -----
      This function simply calls ``scikit-image.measure.mesh_surface_area``, but
      it allows for the passing of the ``mesh`` tuple returned by the
      ``mesh_region`` function, entirely for convenience.