def do_backup(self, line):
        '''.backup ?DB? FILE      
Backup DB (default "main") to FILE'''
        with open(self.detabase, 'rb') as f:
            with open(line, 'wb') as new_db:
                new_db.write(f.read())
.backup ?DB? FILE      
Backup DB (default "main") to FILE
bin/sqlite.py