临时“打补丁”功能mock.side_effect

Question

是否有任何方式临时撤销修补使用mock在side_effect内？ 我特别想打这样的工作：

from mock import patch 
import urllib2 
import unittest 

class SimpleTest(unittest.TestCase): 
    def setUp(self): 
     self.urlpatcher = patch('urllib2.urlopen') 
     self.urlopen = self.urlpatcher.start() 

     def side_effect(url): 
      #do some interesting stuff first 

      #... temporary unpatch urllib2.urlopen so that we can call a real one here 
      r = urllib2.urlopen(url) #this ought to be the real deal now 
      #... patch it again 

      return r 

     self.urlopen.side_effect = side_effect 

    def test_feature(self): 
     #almost real urllib2.urlopen usage goes here 
     p = urllib2.urlopen("www.google.com").read() 


if __name__ == '__main__': 
    unittest.main() 

Answer 1

为什么不只是暂时.stop()补丁？

self.urlopen.stop() 
# points to the real `urlopen()` now 
urllib2.urlopen() 
# put the patch in place again 
self.urlopen.start()