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+=============================================
+Virtualenv, Packaging and Useful Tools
+=============================================
+
+.. class:: center
+
+    March 30, 2015
+
+    Department of Aerospace Engineering,
+    IIT Bombay
+
+    :Author: Prabhu Ramachandran
+
+
+
+Agenda
+=========
+
+- Introduction to virtual env and its use
+
+- Python packaging
+    - What are Packages?
+    - Distributing Packages
+    - PyPI
+
+- Hosting documentation
+
+- Continuous integration
+
+- Test coverage
+
+Preamble: what's a package?
+=============================
+
+A collection of Python modules organized into a hierarchy::
+
+   $ tree jedi
+    jedi/
+    ├── __init__.py
+    ├── api.py
+    ├── builtin.py
+    ...
+    ├── debug.py
+    ├── refactoring.py
+    └── settings.py
+
+
+
+Virtualenvs
+=============
+
+A self-contained virtual Python environment which **you** control!
+
+- Requires a "system" Python distribution
+
+
+Motivation
+===========
+
+- Need to install Python packages
+- No root access
+- Don’t want to mess up system
+- Create “isolated” environment
+
+Virtualenv
+============
+
+- www.virtualenv.org
+- pypi.python.org/pypi/virtualenv
+- Either install virtualenv
+- Or use the `virtualenv.py`_
+
+.. code:: shell
+
+    $ easy_install virtualenv
+
+Or download tarball and::
+
+    $ python setup.py install [--prefix=/usr/local]
+
+.. _`virtualenv.py`: http://github.com/pypa/virtualenv/tree/master/virtualenv.py
+
+
+Environments
+=============
+
+.. code:: shell
+
+    $ python virtualenv.py --help
+
+    $ python virtualenv.py ENV
+
+    $ virtualenv --system-site-packages ENV
+
+- ``ENV`` is a directory name of your choice
+- Self-contained universe
+- Can inherit system packages
+- Look in ``ENV/bin`` (or ``ENV\Scripts``)
+- Look in ``ENV/lib`` (or ``ENV\Lib``)
+
+Activation
+============
+
+.. code:: shell
+
+    # Activation (Linux/Mac OSX)
+    $ source ENV/bin/activate
+
+    $ ENV\Scripts\activate.bat
+
+    # Deactivate
+    (ENV)$ deactivate
+
+Usage
+=======
+
+.. code:: shell
+
+    (ENV)$ deactivate
+    $ python virtualenv.py ANOTHER
+    (ANOTHER)$ source ANOTHER/bin/activate
+    (ANOTHER)$ pip install PKG
+    # installs in ANOTHER
+
+    (ANOTHER)$ deactivate
+    $ source ENV/bin/activate
+
+    # To remove ANOTHER
+    $ rm -rf ANOTHER
+
+Easy and convenient!
+
+Python Packages
+=================
+
+- Organized hierarchy of modules
+- Can include data
+- Documentation
+- Installation and distribution
+
+Installing packages
+====================
+
+.. code:: shell
+
+    $ pip install requests
+
+    $ pip list
+
+    $ pip uninstall requests
+
+Making your own
+==================
+
+Let us look at a simple package
+
+.. code:: shell
+
+    $ tree my_project
+    my_project/
+    ├── README.md
+    └── sees
+        ├── __init__.py
+        └── hello.py
+
+Packaging the package
+=======================
+
+- We want to "install" this
+- Want others to install it
+- Want to share it
+
+- Make sure you have ``setuptools`` available
+
+.. code:: shell
+
+    $ python -c "import setuptools"
+
+No import error means you are good!
+
+Writing a ``setup.py``
+========================
+
+Create ``setup.py``
+
+.. code:: python
+
+    from setuptools import setup, find_packages
+
+    setup(
+        name="sees",
+        version="0.1",
+        description="Utility code for SEES course",
+        author="FOSSEE developers",
+        author_email="python@fossee.in",
+        packages=find_packages(),
+    )
+
+Using it
+==========
+
+.. code:: shell
+
+    $ python setup.py --help
+    $ python setup.py sdist
+    $ python setup.py develop
+    $ python setup.py install
+
+More on distutils
+======================
+
+- Many more options
+- Support to compile extensions
+- Including package data
+- See `setuptools documentation`_
+- See `distutils documentation`_.
+
+.. _setuptools documentation: http://pythonhosted.org//setuptools/
+.. _distutils documentation: https://docs.python.org/2/distutils/index.html#distutils-index
+
+Distributing and PyPI
+=========================
+
+- Register on http://pypi.python.org
+
+.. code:: shell
+
+    $ python setup.py register
+
+- Create a ``~/.pypirc``
+
+::
+
+    [pypirc]
+    servers = pypi
+    [server-login]
+    username:your_awesome_username
+    password:your_awesome_password
+
+Hosting Documentation
+======================
+
+- Bitbucket/Github
+
+- Better: http://www.readthedocs.org
+    - http://read-the-docs.readthedocs.org/
+
+
+Continuous integration
+========================
+
+- Run tests automatically
+
+    - On each commit
+    - For each PR
+    - For all branches
+
+- Potentially on multiple platforms
+
+Continuous integration
+========================
+
+- Jenkins/Hudson
+
+- Travis-ci.org
+
+- Drone.io
+
+- Shippable.com
+
+- Appveyor
+
+
+Travis-CI example
+===================
+
+- Uses a YAML file for config
+- Most others are similar
+- Look at some examples
+
+
+Additional Reading
+===================
+
+Very nice document with examples:
+
+https://pythonhosted.org/an_example_pypi_project/index.html