TsInsideSelection.py

import maya.cmds as cmds
import maya.mel as mm

def TsInsideSelection():
	selEdges = cmds.ls(sl=True, fl=True)
	selType = cmds.selectType(q=True, meshComponents=True )
	
	obj = selEdges[0].split(".")[0]
	
	tmpObj = cmds.duplicate( obj, rr=True )[0]
	cmds.move( 1, 1, 1, tmpObj )
	conEdges =  [tmp.replace(obj, tmpObj) for tmp in selEdges]
	
	cmds.polyUVSet( tmpObj, create=True, uvSet="TempWWWUvSetB" )
	cmds.polyUVSet( tmpObj, currentUVSet=True, uvSet="TempWWWUvSetB" )
	
	fObj = cmds.polyEvaluate( f=True )
	cmds.select( tmpObj, r=True )
	
	cmds.polyProjection( "%s.f[0:%s]" % (tmpObj,fObj), ch=True, type='Planar', ibd=False, kir=True, md="z" )
	cmds.polyMapCut( conEdges, ch=True )
	cmds.select( '%s.map[%s]' % (tmpObj,fObj), r=True )
	mm.eval("polySelectBorderShell 0;")
	
	selUVs = cmds.ls(sl=True, fl=True)
	Faces = cmds.polyListComponentConversion( fuv=True, tf=True)
	
	conFaces =  [tmp.replace(tmpObj, obj) for tmp in Faces]
	cmds.delete(tmpObj)

	cmds.select( conFaces, r=True )