from tkinter import *
canvas1=Tk()
Label(canvas1, text="canvas1").grid(row=0, column=0)
OPEN_HYP=Button(canvas1, text="OPEN", command:enter(canvas1)).grid(row=1, column=0)
def enter():
  canvas2()
def canvas2():
  canvas2=Tk()
  Label(canvas2, text="canvas2").grid(row=0, column=0)