unittest.defaultTestLoader.discover()报错，求助！！！

余寒12

使用unittest.defaultTestLoader.discover（），运行报错：   
raise ImportError('Start directory is not importable: %r' % start_dir)
ImportError: Start directory is not importable: 'F:\\python\\selenium_python\\test_case'
代码如下：

1. #coding=utf-8
   
2. import unittest
   
3. import HTMLTestRunner
   
4. import os ,time
   
5. from multiprocessing.dummy import Process
   
6. # import sys
   
7. # sys.path.append('\selenium_python')
   
8. 
   
9. list_dir = (r'F:\\python\\selenium_python\\test_case1',r'F:\\python\\selenium_python\\test_case')
   
10. 
    
11. def creatsuitel(start_dir):
    
12.     testunit=unittest.TestSuite()
    
13.     print 'testunit:',testunit
    
14.     #discover 方法定义
    
15.     discover=unittest.defaultTestLoader.discover(start_dir,pattern ='start_*.py',top_level_dir=None)
    
16. #     print "discover:" ,discover
    
17.     #discover 方法筛选出来的用例，循环添加到测试套件中
    
18.     for test_suite in discover:
    
19. #         print "test_suite:", test_suite
    
20.         for test_case in test_suite:
    
21. #             print "test_case:", test_case
    
22.             testunit.addTests(test_case)
    
23. #             print testunit
    
24.     return testunit
    
25. # alltestnames = creatsuitel()
    
26. now = time.strftime('%Y-%m-%d-%H_%M_%S',time.localtime(time.time()))
    
27. filename = 'F:\\python\\selenium_python\\report\\'+now+'result.html'
    
28. fp = file(filename, 'wb')
    
29. poclist = []
    
30. for i in range(len(list_dir)):
    
31.     print 'list:', list_dir[i]
    
32.     runner =HTMLTestRunner.HTMLTestRunner(
    
33.     stream=fp,
    
34.     title=u'百度搜索测试报告',
    
35.     description=u'用例执行情况')
    
36.     suite_test = creatsuitel(list_dir[i])
    
37.     print 'suite_test:', suite_test
    
38.     poc = Process(target=runner.run,args=(suite_test,))
    
39.     poclist.append(poc)
    
40. for poc in poclist:
    
41.     poc.start()
    
42. for poc in poclist:
    
43.     poc.join()
    
44. 
    
45. fp.close()

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