human
Solve the following python programming problem given the following code:
@ mock.patch ('os.path.join') 
def test_get_instances_sub_dir(self, fake_path_join) : 
    class WindowsError (Exception) : 
        def __init__(self, winerror = None) : 
            self.winerror = winerror 
fake_dir_name = 'fake_dir_name' 
    fake_windows_error = WindowsError 
    self._pathutils.check_create_dir = mock.MagicMock (side_effect = WindowsError (pathutils.ERROR_INVALID_NAME)) 
    with mock.patch.object (builtins, 'WindowsError', fake_path_join, create = True) : 
        self.assertRaises (exception.AdminRequired, self._pathutils._get_instances_sub_dir, fake_dir_name) 

    
    

    Fix the buggy line: with mock.patch.object (builtins, 'WindowsError', fake_path_join, create = True) :
assistant
#Here is Python code to fix the buggy line: with mock.

with mock.patch.object (builtins, 'WindowsError', fake_windows_error, create = True) :