original_docstring: 
          tearDown will be exec after every test_xxx() function.
          
docstring: tearDown will be exec after every test_xxx() function.
docstring_tokens: tearDown will be exec after every test_xxx () function .
code: def tearDown(self):
          """
          tearDown will be exec after every test_xxx() function.
          """
          # print('tearDown...')
          pass
code_tokens: def tearDown ( self ) : pass
short_docstring: tearDown will be exec after every test_xxx() function.
short_docstring_tokens: tearDown will be exec after every test_xxx () function .
comment: """
          tearDown will be exec after every test_xxx() function.
          """$SEP$# print('tearDown...')