def delete_key(self,
                    match=None,
                    match_dict=None,
                    preserve_minions=False,
                    revoke_auth=False):
        if match is not None:
            matches = self.name_match(match)
        elif match_dict is not None and isinstance(match_dict, dict):
            matches = match_dict
        else:
            matches = {}
        for status, keys in six.iteritems(matches):
            for key in keys:
                try:
                    if revoke_auth:
                        if self.opts.get('rotate_aes_key') is False:
                            print('Immediate auth revocation specified but AES key rotation not allowed. '
                                     'Minion will not be disconnected until the master AES key is rotated.')
                        else:
                            try:
                                client = salt.client.get_local_client(mopts=self.opts)
                                client.cmd(key, 'saltutil.revoke_auth')
                            except salt.exceptions.SaltClientError:
                                print('Cannot contact Salt master. '
                                      'Connection for {0} will remain up until '
                                      'master AES key is rotated or auth is revoked '
                                      'with \'saltutil.revoke_auth\'.'.format(key))
                    os.remove(os.path.join(self.opts['pki_dir'], status, key))
                    eload = {'result': True,
                             'act': 'delete',
                             'id': key}
                    self.event.fire_event(eload, tagify(prefix='key'))
                except (OSError, IOError):
                    pass
        if preserve_minions:
            preserve_minions_list = matches.get('minions', [])
        else:
            preserve_minions_list = []
        self.check_minion_cache(preserve_minions=preserve_minions_list)
        if self.opts.get('rotate_aes_key'):
            salt.crypt.dropfile(self.opts['cachedir'], self.opts['user'])
        return (
            self.name_match(match) if match is not None
            else self.dict_match(matches)
        )
Stub function for closing all ZooKeeper connections.
dataset/ETHPy150Open saltstack/salt/salt/key.py/Key.delete_key--crossover with--dataset/ETHPy150Open AppScale/appscale/AppDB/zkappscale/zktransaction_stub.py/ZKTransaction.close