方案一：循环导入/删除模块

a.py

import sys, time

while True:

	from b import test

	test()

	del sys.modules(b)

	time.sleep(1)

b.py

def test():

	print "something"

方案二：reload模块

a.py

import time

import b

while True:

	b.test()

    reload(b)

	time.sleep(1)

b.py

def test():

	print "something"