python

pip install -r requirement.txt



the requirement.txt looks likes:
=========================
ip==8.1.2
bumpversion==0.5.3
wheel==0.29.0
watchdog==0.8.3
flake8==2.6.0
tox==2.3.1
coverage==4.1
Sphinx==1.4.8
cryptography==1.4
PyYAML==3.11
click
requests
backtrader
=============================