#!/usr/bin/env python# Filename: switch.py# Author: zhangliang - z_liang90@126.com# Last modified: 2014-02-26 10:53# Description:from __future__ import divisiondef arithMetic(x,oprator,y):    result = {        '+':x+y,        '-':x-y,        '*':x*y,        '/':x/y    }      return result.get(oprator)x = input('x:')y = input('y:')oprator = raw_input('oprator:')retval = arithMetic(x, oprator, y)print '%d %s %d = %d' % (x, oprator, y, retval)