def cut_operation ( self , op ) :
    "str"
    if len ( op < 1 :
        sys . stderr . write ( "str" )
    self . target = server . world . get_object_ref ( op [ 0 ] . id ) self . tool = op . to
    self . pos = Point3D ( op [ 0 ] . pos )

def cut_operation ( self , op ) :
    "str"
    if len ( op ) < 1 :
        sys . stderr . write ( "str" )
    self . target = server . world . get_object_ref ( op [ 0 ] . id )
    self . tool = op . to
    self . pos = Point3D ( op [ 0 ] . pos )

次に示すpythonコードの誤りを修正しなさい。