pip & virtualenv

Courage is resistance to fear, mastery of fear—not absence

of fear. Except a creature be part coward, it is not a

compliment to say it is brave; it is merely a loose

misapplication of the word. Consider the flea!—incomparably

the bravest of all the creatures of God, if ignorance of

fear were courage. Whether you are asleep or awake he will

attack you, caring nothing for the fact that in bulk and

strength you are to him as are the massed armies of the

earth to a sucking child; he lives both day and night and

all days and nights in the very lap of peril and the

immediate presence of death, and yet is no more afraid than

is the man who walks the streets of a city that was

threatened by an earthquake ten centuries before. When we

speak of Clive, Nelson, and Putnam as men who "didn't know

what fear was," we ought always to add the flea—and put him

at the head of the procession.

— Pudd'nhead Wilson's Calendar

Незаменимые инструменты любого приличного питониста — pip и virtualenv. Краткая информация для входа в тему:

pip is a tool for installing packages from the Python Package Index.

virtualenv is a tool for creating isolated Python environments containing their own copy of python, pip, and their own place to keep libraries installed from PyPI.

It's designed to allow you to work on multiple projects with different dependencies at the same time on the same machine.

You can see instructions for installing it at virtualenv.org.

After installing it, run virtualenv env to create a new environment inside a directory called env.

You'll need one of these environments for each of your projects. Make sure you exclude these directories from your version control system.

To use the versions of python and pip inside the environment, type env/bin/python and env/bin/pip respectively.

You can "activate" an environment with source env/bin/activate and deactivate one with deactivate. This is entirely optional but might make life a little easier.

http://dabapps.com/blog/introduction-to-pip-and-virtualenv-python/

Статья объясняет – что это, зачем это и какие проблемы это решает.

original post http://vasnake.blogspot.com/2013/09/pip-virtualenv.html