python setup.py install and dependencies

[Marco]

I have a some confusion about the package installation process.
Let's say I have manually installed Python 3.3, so I don't have 
distribute and pip. Now I want to install the bpython shell, so I 
download the source code and after I try to do "python3.3 setup.py 
install".
I did so, and all it'is ok, but I don't have the dependencies 
(pygments), so when I run bpython, Python complains with an ImportError: 
No module named 'pygments'.

So I installed distribute, and after I removed and reinstalled bpython, 
and now "python3.3 setup.py install" has installed pygments too.

So my question is: if I want "python3.3 setup.py install" installs the 
dependencies of a package I need to have distribute?
And pip installs the dependencies because of it uses distribute?

Thanks in advance,
-- 
Marco