problems importing ttk from tkinter in python 2.7

In python 2.7, ttk is its own package:

import Tkinter
import ttk

This is documented in the official python documentation: https://docs.python.org/2/library/ttk.html#module-ttk

For python version 2.7, to import all packages:

from Tkinter import *
from ttk import *

Or you can only import ttk.

import ttk

For python version 3, to import all packages:

import tkinter as tk 
from tkinter import ttk