python and enigma2

[luca72]

Hello i have a dvb decoder with enigma2 inside, The enigma2 plugin can
be made with python.
In my plugin i have to use pyserial, but in the decoder the python2.5
reply in this way:
root at bm750:/var/pyserial-2.5-rc2# python setup.py install
Traceback (most recent call last):
  File "setup.py", line 8, in <module>
    from distutils.core import setup
ImportError: No module named distutils.core

How i can install distutils?

Thanks

Luca