how to use row and columns in a python tkinter code example

Example: python grid

example1 = Label(root, text="Top left column")
example1.grid(row=0, column=0)
#Or
example2 = Label(root, text="Middle right colum") .grid(row=1, column=1)

#ColumnSpan
example3 = Label(root, text="Bottom Row")
example3.grid(row=2, columnspan=2)