从另一个类方法调用变量 - Python（和PyQt）

Question

我需要一个包含登录详细信息的变量，我的所有类都在单独的文件中。

第一个类是登录窗口，它将从数据库中获取用户名和密码

        LoginBtn.clicked.connect(self.CheckLogin)

def CheckLogin(self):
    self.username = self.usernameLE.text()
    self.password = self.passwordLE.text()

    with sqlite3.connect("Accounts.db") as db:
        cursor = db.cursor()
        cursor.execute("SELECT * FROM Accounts WHERE Username=? ",(self.username,))
        self.account = cursor.fetchone()

    try:
        if self.account[0] == self.username and self.account[1] == self.password:
            if self.account[2] == 'Admin':
                self.OpenSystem = CurrentLayoutAdmin()
                self.OpenSystem.show()
                self.hide()
            elif self.account[2] == 'Manager':
                self.departmentsave = self.account[2]
                self.OpenManagerSystem = CurrentLayoutManager() #This goes to main menu and once a button is clicked it opens up another window. The one I need the variable for.
                self.OpenManagerSystem.show()
                self.hide()
            else:
                pass
        else:
            self.invalid_lbl.setVisible(True)
            self.passwordLE.setText('')               
    except TypeError:
        self.invalid_lbl.setVisible(True)
        self.passwordLE.setText('')

我需要持有部门的self.account[2]。

def CreateTable(self): 
    accountdetails = LoginWindow()
    accountdetails.CheckLogin()
    print(accountdetails.departmentsave)

我无法弄清楚如何调用此变量。