python实现跨文件全局变量的方法

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#!/usr/bin/env python2.7 
class GlobalVar: 
  db_handle = None 
  mq_client = None 
def set_db_handle(db): 
  GlobalVar.db_handle = db 
def get_db_handle(): 
  return GlobalVar.db_handle 
def set_mq_client(mq_cli): 
  GlobalVar.mq_client = mq_cli 
def get_mq_client(): 
  return GlobalVar.mq_client

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import globalvar as GlobalVar 
def set(): 
  GlobalVar.set_mq_client(10) 
  print "------set mq_client in set.py------mq_client: " + str(GlobalVar.get_mq_client())

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#!/usr/bin/env python2.7 
import globalvar as GlobalVar 
def get(): 
  print "------get mq_client in get.py------mq_client: " + str(GlobalVar.get_mq_client())

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#!/usr/bin/env python2.7 
import set 
import get 
set.set() 
get.get()