def test_empty_subdir1(self):
        try:
            self.auth.load_creds(subdir='')
        # raises ValueError (zero length field name in format) for python 2.6
        # OSError for the rest
        except OSError:
            pass
        except ValueError:
            pass
        except Exception as e:
            self.fail('Unexpected exception thrown: %s' % e)
        else:
            self.fail('OSError exception not thrown.')
Setting subdir to empty path should raise an error.
dataset/ETHPy150Open nltk/nltk/nltk/test/unit/test_twitter_auth.py/TestCredentials.test_empty_subdir1