Introduction to IPython & Notebook

Areski Belaid <areski@gmail.com>

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Introduction to IPython

- Fernando Perez started IPython in 2001, he wanted a better interactive Python interpreter

- 259 lines of code, written in few hourshttps://gist.github.com/1579699

- Today: 78,481 lines of code & more than 100 contributors in the last 12 monthshttp://www.ohloh.net/p/ipython

What is IPython?

IPython is an interactive shell for Python

● additional shell syntax● introspection● tab completion● rich history● better debugging● parallel computing

Install IPython

http://ipython.org/ipython-doc/stable/install/install.html

$ mkvirtualenv testipython$ pip install ipython

- You could also use easy_install, but do you want to, really?

Hands On IPython- Shell

$ ls, pwd, !vim

- Code completion$ import os$ os.[press tab]

- Introspection$ os?$ os??

- History> use the key up and down

- Execute previous command$ _i, _ii, _iii : Previous, next previous, next next previous input

- Load Code > %loadpy- Traceback and Debugger %pdb

Integration with your IDE

- Vimhttps://github.com/ivanov/vim-ipython

- Sublime Texthttps://github.com/iambus/SublimeIPython

- TextMatehttp://wiki.ipython.

org/Cookbook/Using_IPython_with_TextMate

NOTEBOOK

What is Notebook?A web-based application that can execute code and also contain

rich text and figures, mathematical equations and arbitrary HTML

- a web-based shell to an IPython

- a mix of notes, code, html, images, video, ...

- a great tool for debugging, teaching

- has ability to save, edit and delete

“notebooks”

Install Notebook

Let's forget about easy_install, seriously?$ pip install ipython$ pip install pyzmq$ pip install tornado

$ ipython notebook

For some of the online examples :$ pip install numpy$ apt-get install libatlas-base-dev gfortran$ pip install scipy$ pip install matplotlib

Hands on Notebook

$ ipython notebook

- Cell-based execution workflow

- Load previous code

- Share IPython Notebook

http://nbviewer.ipython.org/

Notebook - Django Extension

Notebook is not only for Physicists !!!

- Use it with Django: https://github.com/django-extensions/django-extensions/pull/234

$ ./manage.py shell_plus --notebook

There is a little bug with the last IPython, that you can fix easily:export PYTHONPATH=/home/areski/public_html/django/MyProjects/newfies-dialer

Add this in your settings.py:IPYTHON_ARGUMENTS = ['--ext', 'django_extensions.management.notebook_extension','--debug']

Conclusion- IPython Introspection, additional shell, tab completion, rich history,parallel computer, etc...

- NotebookAll the benefits of IPython on the web

IPython received a GrantSloan Foundation grant: IPython has been awarded a $1.15 million grant from the Alfred P. Sloan Foundation. This will support several core developers, allowing them to focus on building the IPython Notebook into a tool for open, collaborative, reproducible scientific computing.

The Future is Bright !!!

References- IPython : Python at your fingertips: http://www.youtube.com/watch?v=26wgEsg9Mcc

- Using IPython Notebook with Django:http://andrewbrookins.com/python/using-ipython-notebook-with-django/

- IPython Docs:http://ipython.org/documentation.html

- IPython Notebook Viewer:http://nbviewer.ipython.org/

Hope you enjoyed it!

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