How to download python tkinter?

Answer 1

You don't need to, only add that to your code:
import tkinter

Answer 2

I'm not good at GUI building(a friend codes GUI when I code the program) but it is available for all Python 3.x versions

Answer 3

But I can open a window at leats?:
import tkinter

root=Tk()
root.mainloop()

Answer 4

its available on python 3.5.1 version?
can u write a code for( hello) for me