pip3 install swampy is giving the python2 version #5

From Ubuntu 14.04:

1. sudo pip3 install swampy
2. python3
>>> import swampy.TurtleWorld

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.4/dist-packages/swampy/TurtleWorld.py", line 8, in <module>
    from Tkinter import TOP, BOTTOM, LEFT, RIGHT, END, LAST, NONE, SUNKEN
ImportError: No module named 'Tkinter'


Package python3-tk is installed, and the documentation at 
http://www.greenteapress.com/thinkpython/swampy/install.html while it doesn't 
mention pip3, hints that it should work with python3

Thank you!