将QSqlDatabase子类化以产生异常的PyQt

from PyQt5.QtSql import QSqlDatabase, QSqlError

class MyDatabase(QSqlDatabase):
    def open(self, *args, **kwargs):
        # 在打开数据库时抛出异常
        raise QSqlError("Failed to open database")

# 创建一个实例并尝试打开数据库
database = MyDatabase.addDatabase("QSQLITE")
database.setDatabaseName("mydatabase.db")

try:
    if not database.open():
        print("Failed to open database")
    else:
        print("Database opened successfully")
except QSqlError as e:
    print("Error:", e.text())