def close(self):
        try:
            typ, dat = self._simple_command('CLOSE')
        finally:
            self.state = 'AUTH'
        return typ, dat
This is a test to see if a positive value exists. All of these return false:
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/imaplib.py/IMAP4.close--crossover with--dataset/ETHPy150Open wevoteeducation/WeVoteBase/wevote_functions/models.py/value_exists