def __verify_write(self, block, digest, block_nr, inode): # {{{3
    if self.verify_writes:
      saved_value = self.decompress(self.blocks[digest])
      if saved_value != block:
        # The data block was corrupted when it was written or read.
        dumpfile_corruption = '/tmp/dedupfs-corruption-%i' % time.time()
        handle = open(dumpfile_corruption, 'w')
        handle.write(block % 'The content that should have been stored is %r.\n')
        handle.write('The content that was retrieved from the database is %r.\n' % saved_value)
        handle.close()
        self.logger.critical(
            "Failed to verify data with block number %i of inode %i!\n" + \
            "Saved original and corrupted data blocks to %i.",
            block_nr, inode, dumpfile_corruption)
        os._exit(1)
dataset/ETHPy150Open xolox/dedupfs/dedupfs.py/DedupFS.__verify_write/swapped operands of `%`