Figure in ENTRY after compression

[Kadyn]

from tkinter import *

window = Tk()
window.title("Python window")
window.geometry("300x200")

btn1 = Button(text="1", height="3", width="3").grid(row=1, column=1, padx=80, pady=100)
entry = Entry(width=50)
entry.grid(row=0, column=0, columnspan=5)


window.mainloop()

How can you do that when you press "1" in ENTRY?

[inna]

This is the full code:

from tkinter import *
window = Tk()
window.title("Python window")
window.geometry("300x200")
entry = Entry(width=50)
entry.pack()
def ad2():
    entry.delete(0, END)
def ad():
    entry.delete(0, END)
    entry.insert(END, '1')
btn1 = Button(text="1", height="3", width="3", command=ad).pack()
btn2 = Button(text="удалить", command=ad2).pack()
entry.pack()
window.mainloop()