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  | import sys | |
| class Tee(object): | |
| def __init__(file_name, mode): | |
| self._file = open(file_name, mode) | |
| def __enter__(self): | |
| return self | |
| def __exit__(self): | |
| self.__close() | 
  
    
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  | import unittest | |
| class Test(unittest.TestCase): | |
| def test_a(self): | |
| print ("a") | |
| def test_b(self): | |
| print ("b") | 
  
    
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  | import threading | |
| n = 0 | |
| def add_one(): | |
| global n | |
| n += 1 | |
| def fun(m): | |
| threads = [] | |
| for i in range(m): | |
| t = threading.Thread(target=add_one) | 
  
    
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  | class Popen(object): | |
| if mswindows: | |
| def communicate(self): | |
| """ | |
| Windows implementation | |
| """ | |
| pass | |
| else: | |
| def communicate(self): | |
| """ |