Python pass more than one arguments to tcl proc using Tkinter tcl.eval

how to pass more than one arguments to tcl proc using Tkinter. i want to pass 3 args to tcl proc tableParser from python proc validate_op which has 3 args...

from Tkinter import Tcl
import os

tcl = Tcl()

def validate_op(fetch, header, value):
    tcl.eval('source tcl_proc.tcl') 
    tcl.eval('set op [tableParser $fetch $header $value]') <<<<< not working



proc tableParser { result_col args} {

  ..
..
..

}