选择一个选项后如何退出NpyScreen应用程序？

Question

因此，我有一个引导选择python脚本，根据输入的选项，它将使用subprocess.call启动一个单独的python脚本。我试图使用NpyScreen使其看起来更好，但是我在应用程序窗口停留在屏幕上并冻结python脚本时遇到了问题。我想知道如何在执行subprocess.call之前/之后退出NpyScreen应用程序以清除屏幕并使其继续工作。我提供了2张示例照片，说明选择选项之前/之后发生的情况。

这是我单击选项之一时发生的情况。它执行，但仅覆盖前10个字符并冻结代码。 Code Error (unable to embed image)

这是我正在使用的代码。

import npyscreen
import os
import getpass
import subprocess

class mainform(npyscreen.ActionForm):
    def create(self):
        self.OSPath = "/SYS64 3.7/"
        self.full_path = os.getcwd()
        self.CurrentPath = ""
        self.dir_path = os.path.dirname(os.path.realpath(__file__))

        opt_values = ["jdos", "jdos.fboot", "jdos.admin", "jdos.exp"]

        welcome_box = self.add(npyscreen.BoxTitle, max_height = 2, editable = False, value = "Welcome. Select BOOT PARAMETER")
        self.answer = self.add(npyscreen.TitleSelectOne, max_height = 4, name = "Selections:", values = opt_values, scroll_exit = True)


    def on_ok(self):
        if self.answer.value[0] == 0:
            subprocess.call(["python3", self.dir_path + self.OSPath + "bootthingy.py"])
            subprocess.call(["python3", self.dir_path + self.OSPath + "jdosos.py"])
        elif self.answer.value[0] == 1:
            subprocess.call(["python3", self.full_path + self.OSPath + "jdosos.py"])
        elif self.answer.value[0] == 2:
            user = getpass.getpass("username: ")
            password = getpass.getpass("password: ")
            bootcheck = 0
            with open('userpass.txt','r') as file:
                for line in file:
                    line = line.strip('\n')
                    login = line.split(',')
                    if login[0] == user and login[1] == password:
                        subprocess.call(["python3", self.full_path + self.OSPath + "jdososadmin.py"])
                        bootcheck = 1
                if bootcheck == 0:
                    print("Incorrect user or password.")
        elif self.answer.value[0] == 3:
            subprocess.call(["python3", self.full_path + self.OSPath + "jdosexperimentail.py"])

        self.parentApp.setNextForm(None)

    def on_cancel(self):
        self.parentApp.setNextForm(None)

#Application starts here
class App(npyscreen.NPSAppManaged):

    #Defining forms.
    def onStart(self):
        self.addForm('MAIN', mainform, name="name_here")

if __name__ == "__main__":
    app = App().run()

我希望NpyScreen应用程序窗口关闭，然后执行subprocess.call函数。