def add():
    print("Hello")
from tkinter import *    
root = Tk()
but1 = Button(root,
               text = "Добавить авто",width=31,height=1,
               bg="gray",fg="blue"
               ).grid(row = 0, column = 0, sticky = S)
Button(root,
               text = "Удалить авто",width=31,height=1,
               bg="gray",fg="blue"
               ).grid(row = 1, column = 0, sticky = S)
Button(root,
               text = "Редактировать авто",width=31,height=1,
               bg="gray",fg="blue"
               ).grid(row = 0, column = 1, sticky = S)
Button(root,
               text = "Поиск авто",width=31,height=1,
               bg="gray",fg="blue"
               ).grid(row = 1, column = 1, sticky = S)
Button(root,
               text = "Просмотреть список авто",width=64,height=1,
               bg="red",fg="blue"
               ).grid(row = 2, column = 0, columnspan = 2, sticky = W)
root.results_text = Text(root, width = 56, height = 7, wrap = WORD)
root.results_text.grid(row = 3, column = 0, columnspan = 2)
but1.bind("<Button-1>", add)
root.title("Центр продажи автомобилей")
root.geometry("395x175")
root.mainloop()

but1 = Button(root,
           text = "Добавить авто",width=31,height=1,
            bg="gray",fg="blue"
            )
but1.grid(row = 0, column = 0, sticky = S)