#entry

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import tkinter as tk




def downKey(event):
    handle = event.widget.focus_get()
    lstHandle[lstHandle.index(handle) + 1].focus()


def upKey(event):
    handle = event.widget.focus_get()
    lstHandle[lstHandle.index(handle) - 1].focus()




win = tk.Tk()
win.geometry("500x500+500+200")




win.bind('<Down>', downKey)
win.bind('<Up>', upKey)


lstHandle = []


ent1 = tk.Entry()
lstHandle.append(ent1)
ent1.place(x=196,y=5)


ent2 = tk.Entry()
lstHandle.append(ent2)
ent2.place(x=196,y=30)


ent3 = tk.Entry()
lstHandle.append(ent3)
ent3.place(x=196,y=55)


ent4 = tk.Entry()
lstHandle.append(ent4)
ent4.place(x=196,y=80)


ent5 = tk.Entry()
lstHandle.append(ent5)
ent5.place(x=196,y=105)




win.mainloop()