how to check the installed version of pip in for python code example

Example 1: check package version python

import packagename
print(packagename.__version__)

Example 2: get version package from pip

$ pip show Jinja2
---
Name: Jinja2
Version: 2.7.3
Location: /path/to/virtualenv/lib/python2.7/site-packages
Requires: markupsafe