from tkinter import * window = Tk() window.title("Aimtocode") window.geometry('350x200') lbl = Label(window, text="Hello") lbl.grid(column=0, row=0) def clicked(): lbl.configure(text="Welcome to Aimtocode") btn = Button(window, text="Click Me", command=clicked) btn.grid(column=1, row=0) window.mainloop()