Problems with the pip install

As you have been told both Tkinter and Ttk are part of the standard Python library, therefore it does not make sense to try to use pip to install it.

That said, the problem may be how to import them. In Python 2.x Ttk is an external module to Tkinter while in Python 3.x is part of the same package. To import it a very common way is:

Python 3.x:

import tkinter as tk
from tkinter import ttk 

Python 2.x:

import Tkinter as tk
import ttk

Note that in Python 2.x the module Tkinter is capitalized and in Python 3.x is lowercase.

This way, you do not overwrite the native Tkinter widgets with those of Ttk, making the code much more readable by always explaining which toolkit you are using at any time.

An example of use:

• Python 3.x:

  import tkinter as tk
  from tkinter import ttk
  
  master = tk.Tk()
  
  def callback1():
      print ("Click en el boton de tkinter")
  
  def callback2():
      print ("Click en el boton de ttk")
  
  boton1 = tk.Button(master, text="Tkinter", command=callback1)
  boton2 = ttk.Button(master, text="ttk", command=callback2)
  boton1.pack()
  boton2.pack()
  
  master.mainloop()
  

• Python 2.x:

  import Tkinter as tk
  import ttk
  
  master = tk.Tk()
  
  def callback1():
      print ("Click en el boton de tkinter")
  
  def callback2():
      print ("Click en el boton de ttk")
  
  boton1 = tk.Button(master, text="Tkinter", command=callback1)
  boton2 = ttk.Button(master, text="ttk", command=callback2)
  boton1.pack()
  boton2.pack()
  
  master.mainloop()
  

boton1 is a native button of Tkinter while boton2 is an 'enhanced' button of extension Ttk .

You can see more about Tkinter and its use in the official documentation of Python.

If these codes give you an error edit the question and provide the error that marks you, the code you use and how to import the modules so we can help you better.