from tkinter import*
from math import*

okno=Tk()
okno.title("07-2.B-21.11.2022")

def vymaz():
    vstup1.delete(0,END)
    #
    

def urob():
    a=int(vstup1.get())
    #doplnit
    vstup1.delete(0,END)
    vstup1.insert(0,str(a)+"TEXT")



text1=Label(okno,text="GTV PROGRAM 2.B")
text1.grid(row=0,column=0)

text2=Label(okno,text="a=")
text2.grid(row=1,column=0)

#

vstup1=Entry(okno,width=10)
vstup1.grid(row=1,column=1)

#

tlac1=Button(okno,text="Ukončiť",width=10,command=okno.destroy)
tlac1.grid(row=5,column=0)

tlac2=Button(okno,text="Urob",width=10,command=urob)
tlac2.grid(row=6,column=0)

tlac3=Button(okno,text="Vymaž",width=10,command=vymaz)
tlac3.grid(row=5,column=1)


okno.mainloop()