Jupyter¶

Started as part of IPython
IPython since 2001
Document Format: nbformat
Interactive Computing Protocol: jupyter-client
Interactive Environment: notebook
Language-agnostic (> 50 language kernels)
Multi-user notebook server: JupyterHub
https://jupyter.org

Notebook with code and prose¶

Here is an example that uses SymPy to factor polynomials.

In [12]:

from ipywidgets import interact
from sympy import Symbol, Eq, factor
from sympy.interactive import init_printing
init_printing(use_latex='mathjax')

In [13]:

x = Symbol('x')
x

Out[13]:

$x$

In [14]:

@interact
def factorit(n=12):
    return Eq(x**n-1, factor(x**n-1))

$x^{22} - 1 = \left(x - 1\right) \left(x + 1\right) \left(x^{10} - x^{9} + x^{8} - x^{7} + x^{6} - x^{5} + x^{4} - x^{3} + x^{2} - x + 1\right) \left(x^{10} + x^{9} + x^{8} + x^{7} + x^{6} + x^{5} + x^{4} + x^{3} + x^{2} + x + 1\right)$

Plotting¶

Inline plotting with matplotlib

In [15]:

%matplotlib inline
import numpy as np
import matplotlib.pyplot as plt
import seaborn as sns

We want to plot:

$\begin{equation} y = sin(\omega t) \end{equation}$

In [16]:

def plot_sinωt(ω=3, T=5):
    t = np.linspace(0, T, 1000)
    y = np.sin(ω * t)
    plt.plot(t, y)
    plt.title(r"$\omega = %s$" % ω)

plot_sinωt(5, 5)
# interact(plot_sinωt)

Interactive graphics with Bokeh¶

In [17]:

import time
from bokeh.io import output_notebook, show
from bokeh.charts import Scatter
from bokeh.sampledata.iris import flowers

output_notebook()

BokehJS successfully loaded.

In [18]:

# fill a data frame with the data of interest and create a groupby object
df = flowers[["petal_length", "petal_width", "species"]]
xyvalues = df.groupby("species")

TOOLS="resize,crosshair,pan,wheel_zoom,box_zoom,reset,previewsave"

scatter = Scatter(xyvalues, tools=TOOLS, ylabel='petal_width')

show(scatter)

	inspect Crosshair

Contributing to Jupyter & IPython¶

Several repos
All BSD licensed
Mostly Python (some JavaScript)
All on GitHub via Pull Requests
Jupyter Mailing List
~5 full-time funded core developers, hiring more in USA
~10 industry-provides contributors (Rackspace, Continuum, Bloomberg, Google, IBM)
Weekly short report meetings online