NOTE: Better to view the notebook at http://nbviewer.jupyter.org/github/wtak23/jupyter-notes/tree/master/?flush_cache=true/ (nbviewer FAQ)

Most notes here were wrote with the old ipython-notebook (before the whole Jupyter movement). That was when I first began to learn python. Back then, I had a luke-warm feeling about ipython-notebook, and preferred to use Anaconda Spyder environment. Getting my hands wet with jupyter-notebook after a few months hiatus, I was pleasantly surprised on the amount of improvement they made (e..g., integration with R with magic-cell, hyper-linked TOC that makes code navigation smoother).

I probably will use this more often when trying to acclimate myself with new python packages and web APIs.

Contents

Personal snippets

from IPython.display import HTML
HTML('<iframe src=https://plot.ly/~empet/13475/ width=850 height=350></iframe>')

TOC for hosting on jupyter notebook

When ready to host the code on nbviewer, insert below as a markdown cell (this will destroy the TOC on the right-sidebar in jupyter, but will create a nice auto-generated TOC at the top of the notebook).

Credit: https://github.com/kmahelona/ipython_notebook_goodies

**Table of Contents**

<div id="toc"></div>
<script type="text/javascript" 
src="https://raw.github.com/kmahelona/ipython_notebook_goodies/master/ipython_notebook_toc.js">
</script>

Cell magics

http://ipython.readthedocs.io/en/stable/whatsnew/version0.13.html#cell-magics

Also checkout rmagic

• %%!: run cell body with the underlying OS shell; this is similar to prefixing every line in the cell with !.
• %%bash: run cell body under bash.
• %%capture: capture the output of the code in the cell (and stderr as well). Useful to run codes that produce too much output that you don’t even want scrolled.
• %%file: save cell body as a file.
• %%perl: run cell body using Perl.
• %%prun: run cell body with profiler (cell extension of %prun).
• %%python3: run cell body using Python 3.
• %%ruby: run cell body using Ruby.
• %%script: run cell body with the script specified in the first line.
• %%sh: run cell body using sh.
• %%sx: run cell with system shell and capture process output (cell extension of %sx).
• %%system: run cell with system shell (%%! is an alias to this).
• %%timeit: time the execution of the cell (extension of %timeit).

Enable toggle code

Insert the following in code cells:

from IPython.display import HTML

HTML('''<script>
code_show=true;
function code_toggle() {
 if (code_show){
 $('div.input').hide();
 } else {
 $('div.input').show();
 }
 code_show = !code_show
}
$( document ).ready(code_toggle);
</script>
<form action="javascript:code_toggle()"><input type="submit" value="Click here to toggle on/off the raw code."></form>''')

Frequently used config

import ipywidgets as widgets
from IPython.widgets import interact, interactive
from IPython.display import display

import seaborn as sns
sns.set_style("whitegrid")
sns.set_context("notebook", rc={'figure.figsize':(14,10)})

import pandas as pd
pd.set_option('display.max_rows', 20)
pd.set_option('precision',4)