The MFaceSeq object

delete(deledges, faces)

Parameters:

deledges - controls whether just the faces (deledges=0) or the faces and edges (deledges=1) are deleted. These correspond to the "Only Faces" and "Edges & Faces" options in the Edit Mode pop-up menu
           (type=int)

faces - a sequence (list or tuple) containing one or more of:

• an MEdge belonging to the mesh
• a integer, specifying an index into the mesh's face list

           (type=multiple ints or MFaces)

extend(vertseq)

Add zero or more faces and edges to the mesh. Faces which already exist in the mesh, or faces which contain the same vertex multiple times are ignored. Sequences of two vertices are accepted, but no face will be created.

 import Blender
 from Blender import Mesh

 me = Mesh.Get("Plane")          # get the mesh data called "Plane"
 v = me.verts                    # get vertices
 if len(v) >= 6:                 # if there are enough vertices...
   me.faces.extend(v[1],v[2],v[3]) #   add a single edge
   l=[(v[0],v[1]),[0,2,4,5]]
   me.faces.extend(l)            #   add another face

Parameters:

vertseq - either two to four ints or MVerts, or sequence (list or tuple) of sequences each containing two to four ints or MVerts.
           (type=sequence(s) of MVerts)

selected()

Returns:

a list of the indices for all faces selected in edit mode.
           (type=list of ints)