blender var path

def f( obj ):
    def g( obj, objs, varpath ):
        if obj.name in objs:
            for o in objs:
                if o == obj:
                    return varpath + "['" + obj.name + "']";
    s = g( obj, bpy.data.objects, "bpy.data.objects")
    if None != s:
        return s
    s = g( obj, bpy.data.meshes, "bpy.data.meshes")
    if None != s:
        return s
#
# >> obj = bpy.data.objects['Plane']
# >> f( obj )
# "bpy.data.objects['Plane']"
# >> f( obj.data )
# "bpy.data.meshes['Plane']"