UI.py

from tkinter import *
import time

class UI:
    def inputDat():
        ui = Tk()
        ui.geometry("300x300")
        ui.title("Input Data")
        frame1 = Frame(ui)
        frame1.pack()

        label1 = Label(frame1, text = "Masukkan nama: ")
        label1.pack(side = LEFT)

        textbox1 = Entry(frame1, bd = 5, width = 20)
        textbox1.pack(side = LEFT)

        Button1 = Button(ui, text = "Input", command = lambda: UI.process(textbox1.get()))
        Button1.place(x = 150,y = 50)
        ui.mainloop()


    def process(dat):
       restRFID.getDat(dat)

class restRFID(object):
    dat = ""
    #cons = True
    def getDat(dd):

        ui2 = Tk()
        ui2.geometry("300x300")
        ui2.title("Get Data")
        frame11 = Frame(ui2)
        frame11.pack()
        var2 = StringVar()
        for i in range(6):
            restRFID.dat += dd + "\n"
            #var2.set(dat)
            time.sleep(0.1)
            frame11.update()

        label2 = Label(frame11, text = restRFID.dat)
        label2.pack(side = LEFT)
        restRFID.dat = ""

        Button2 = Button(ui2, text = "Back",command = lambda: restRFID.process())
        Button2.place(x = 150,y = 50)

        ui2.mainloop()

    def process():
        #restRFID.cons = False
        UI.inputDat()

if __name__ == '__main__':
    UI.inputDat()