virtualenv cheat sheet

InsecurePlatformWarning

#To solve the InsecurePlatformWarning
#==========================================
#for ubuntu
sudo apt-get install libffi-dev libssl-dev
pip install pyopenssl ndg-httpsclient pyasn1

virtualenv_cheat_sheet.sh

#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.

#init project specific env, run virtualenv env to create a new environment inside a directory called env.
cd ~/code/myproject/
virtualenv env

#source to use env/bin/pip, notice this only last for this terminal session
source env/bin/activate

#check to see which python is using
which python

#restore to use the system's python
deactivate

#generate requirement.txt, NOTICE if not using virtualenv, this will generate all the package in the system even if you are not using it
pip freeze > requirements.txt

#search for package
pip search 

#install dependencies from setting file
#env/bin/pip install -r requirements.txt

# fix up an environment to make it relocatable 
# Note: you must run this after you've installed any packages into the environment. 
# If you make an environment relocatable, then install a new package, you must run virtualenv --relocatable again.
virtualenv --relocatable env