如何从导入的包调用tkinter中的方法?

我有一个记录屏幕的python脚本,但现在当我尝试使用tkinter运行屏幕记录脚本并从tk窗口中的按钮终止时,我面临以下问题:

self.Recorder Button=按钮(frame,text=“Start Recording”,command=self.Recorder.record_screen)属性错误:“试用”对象 '

这是我的python代码:

from tkinter import *
import Recorder

class Trial:

    def __init__(self, master):
        frame = Frame(master)
        frame.pack()

        # self.printButton = Button(frame, text="Print Message", command=self.printMessage)
        # self.printButton.pack(side=LEFT)
        self.recorderButton = Button(frame, text="Start Recording", command=self.Recorder.record_screen)
        self.recorderButton.pack(side=LEFT)

        self.quitButton = Button(frame, text="Quit", command=frame.quit)
        self.quitButton.pack(side=LEFT)

    def printMessage(self):
        print("Hello there its me Nitin!")

root = Tk()
alpha = Trial(root)
root.mainloop()