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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 open(cls, dbpath=Path("~/.maas.db").expanduser(), migrate_from=Path("~/.maascli.db").expanduser()):
 """Load a profiles database. Called without arguments this will open (and create) a database in the user's home directory. **Note** that this returns a context manager which will close the database on exit, saving if the exit is clean. :param dbpath: The path to the database file to create and open. :param migrate_from: Path to a database file to migrate from. """

        # Ensure we're working with a Path instance.
        dbpath = Path(dbpath)
        migrate_from = Path(migrate_from)
        # See if we ought to do a one-time migration.
        migrate = migrate_from.is_file() and not dbpath.exists()
        # Initialise filename with restrictive permissions...
        dbpath.touch(mode=0o600, exist_ok=True)
        # Final check to see if it's safe to migrate.
        migrate = migrate and not migrate_from.samefile(dbpath)
        # before opening it with sqlite.
        database = sqlite3.connect(str(dbpath))
        try:
            store = cls(database)
            if migrate:
                schema_import(database, migrate_from)
                yield store
            else:
                yield store
        except:  # noqa: E722
            raise
        else:
            database.commit()
        finally:
            database.close()