test.py

#!/usr/bin/env python3
import apsw


class Example:
    def connect(self):
        while True:
            dbname = "example.db"
            connection = apsw.Connection(str(dbname))
            connection.cursor().execute("PRAGMA journal_mode = WAL")
            connection.setbusyhandler(self.busyHandler)
            print(".", end="", flush=True)

    def busyHandler(self, n):
        print("callled")
        return True


ex = Example()
ex.connect()