how towrite text in tkinter code example

Example 1: font in tkinter

import tkinter.font as TkFont

font = tkFont.Font ( option, ... )
# Exaple
helv36 = tkFont.Font(family="Helvetica",size=36,weight="bold")

Example 2: tkinter set text

def set_input(value):
    text.delete(1.0, "END")
    text.insert("END", value)