Parcel is available on the BitBucket project page.
Clone the public repository:
$ hg clone https://bitbucket.org/andrewmacgregor/parcel
Once you have a copy of the source code, install it into your python environment:
$ python setup.py install
To check that Parcel is successfully installed:
$ python
Python 2.6.1 (r261:67515, Jun 24 2010, 21:47:49)
[GCC 4.2.1] on debian
Type "help", "copyright", "credits" or "license" for more information.
>>> import parcel