python3 - No module named 'html5lib'

Thu Apr 14 05:31:59 EDT 2016

I'm running a python3 program that requires html5lib but I receive the error No module named 'html5lib'.
Here are two session of terminal:
 sam at pc ~ $ python
 Python 2.7.9 (default, Mar 1 2015, 12:57:24) 
 [GCC 4.9.2] on linux2
 >>> import html5lib
 >>> html5lib.__file__
 '/usr/local/lib/python2.7/dist-packages/html5lib/__init__.pyc'
 >>> quit()
 sam at pc ~ $ python3
 Python 3.4.2 (default, Oct 8 2014, 10:45:20) 
 [GCC 4.9.1] on linux
 >>> import html5lib
 Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 ImportError: No module named 'html5lib'
Where can be the problem?