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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def delete_everything(self):
 """Delete everything in a storage layout Named provocatively for a reason: can (and in fact intended to) cause irrecoverable loss of data. This can be used to: * Completely obliterate data from old WAL-E versions (i.e. layout.VERSION is an obsolete version) * Completely obliterate all backups (from a decommissioned database, for example) """

        for k in self._backup_list(prefix=self.layout.basebackups()):
            self._maybe_delete_key(k, 'part of a base backup')

        for k in self._backup_list(prefix=self.layout.wal_directory()):
            self._maybe_delete_key(k, 'part of wal logs')

        if self.deleter:
            self.deleter.close()