Python Pip Usage

Basic PIP install
pip install somepackage

Basic PIP uninstall
pip uninstall somepackage

Requirements file
# cat requirements.txt
MyApp
Framework==0.0.1
Library>=0.2

Installing using a requirements file
pip install -r requirements.pip

PIP Freezing requirements
pip freeze # lists all packages and the specific version installed. Useful for migrating

PIP install into virtualenv env
pip install -E ./env
pip install -E ./env -r requirements.pip # using a requirements file

Basic script for creating a virtualenv and installing requirements
virtualenv --distribute --no-site-packages ve
source ./ve/bin/activate
pip install -E ./ve -r requirements.pip
pip install -E ./ve -r requirements-test.pip

http://heisel.org/blog/2009/11/21/django-hudson/
http://pip.openplans.org/#freezing-requirements

Python Virtual Env

Download and install via apt-get, ports, easy_install, etc.

Locate the install directory (usually site-packages) and find the virtualenv.py script.
Alternatively, the package manager may have installed a virtualenv script into your PATH.

I will use ENV to refer to /path/to/python/virtual/env
I will use virtualenv.py to refer to /path/to/script/virtualenv.py

Create a new Virtual Environment
python virtualenv.py ENV

(optional) Activate (set PATH and PYTHONPATH) for new Virtual ENV
source ENV/bin/activate

Location of Virtual Env python binary
ENV/bin/python

Location of Virtual ENV python site-packages dir
ENV/lib/python2.x/site-packages/

Location of Virtual ENV python easy_install script
ENV/bin/easy_install


http://pypi.python.org/pypi/virtualenv

MacPorts Usage

Update MacPorts itself
sudo port selfupdate
sudo port -d selfupdate # debug

Updates the port tree with new versions definitions
sudo port sync

List available ports
sudo port list

Search ports
port search [keyword]

Lookup package info (desc, maintainer, etc)
port info [package]

Find package dependencies
port deps [package]

Install package
sudo port install [package]
sudo port -v install [package] #verbose

Clean out build files and tarballs
port clean --all [pakcage]

Uninstall a package
sudo port uninstall [package]

Show port contents
port contents [package]

List installed packages
port installed

List outdated ports
port outdated

Upgrade specific packages
port upgrade [package]
port upgrade outdated #updates all outdated packages


http://guide.macports.org/chunked/using.html