# Jupyter notebooks¶

You can also create content with Jupyter Notebooks, using the MyST-NB Sphinx extension.

## Markdown + notebooks¶

As it is markdown, you can embed images, HTML, etc into your posts! You an also $$add_{math}$$ and

$math^{blocks}$

or

\begin{split} \begin{align*} \mbox{mean} la_{tex} \\ \\ math blocks \end{align*} \end{split}

But make sure you $Escape$your $dollar signs$you want to keep!

## Code blocks and image outputs¶

Jupyter Book will also embed your code blocks and output in your book. For example, here’s some sample Matplotlib code:

from matplotlib import rcParams, cycler
import matplotlib.pyplot as plt
import numpy as np

# Fixing random state for reproducibility
np.random.seed(19680801)

N = 10
data = [np.logspace(0, 1, 100) + np.random.randn(100) + ii for ii in range(N)]
data = np.array(data).T
cmap = plt.cm.coolwarm
rcParams['axes.prop_cycle'] = cycler(color=cmap(np.linspace(0, 1, N)))

from matplotlib.lines import Line2D
custom_lines = [Line2D(, , color=cmap(0.), lw=4),
Line2D(, , color=cmap(.5), lw=4),
Line2D(, , color=cmap(1.), lw=4)]

fig, ax = plt.subplots(figsize=(10, 5))
lines = ax.plot(data)
ax.legend(custom_lines, ['Cold', 'Medium', 'Hot']); Note that the image above is captured and displayed. print("this works for code cells too, if you add a margin tag to them")

this works for code cells too, if you add a margin tag to them

# You can also include enriched outputs like Math
from IPython.display import Math
Math("\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}")

$\displaystyle \sum_{i=0}^n i^2 = rac{(n^2+n)(2n+1)}{6}$

## Removing content before publishing¶

You can also remove some content before publishing your book to the web. For example, in ./notebooks.md, there used to be a cell below…

You can also remove only the code so that images and other output still show up.

Below we’ll only display an image. It was generated with Python code in a cell, which you can see in the original notebook

thisvariable = "this plot *will* show up in the textbook."

fig, ax = plt.subplots()
x = np.random.randn(100)
y = np.random.randn(100)
ax.scatter(x, y, s=np.abs(x*100), c=x, cmap=plt.cm.coolwarm)
ax.text(0, .5, thisvariable, fontsize=20, transform=ax.transAxes)
ax.set_axis_off() And here we’ll only display a Pandas DataFrame. Again, this was generated with Python code from this original notebook.

import pandas as pd
df = pd.DataFrame([['hi', 'there'], ['this', 'is'], ['a', 'DataFrame']], columns=['Word A', 'Word B'])
df

Word A Word B
0 hi there
1 this is
2 a DataFrame

You can even style Pandas DataFrames! See the Pandas Styling docs for more information.

import pandas as pd

np.random.seed(24)
df = pd.DataFrame({'A': np.linspace(1, 10, 10)})
df = pd.concat([df, pd.DataFrame(np.random.randn(10, 4), columns=list('BCDE'))],
axis=1)
df.iloc[3, 3] = np.nan
df.iloc[0, 2] = np.nan

def color_negative_red(val):
"""
Takes a scalar and returns a string with
the css property 'color: red' for negative
strings, black otherwise.
"""
color = 'red' if val < 0 else 'black'
return 'color: %s' % color

def highlight_max(s):
'''
highlight the maximum in a Series yellow.
'''
is_max = s == s.max()
return ['background-color: yellow' if v else '' for v in is_max]

df.style.\
applymap(color_negative_red).\
apply(highlight_max).\
set_table_attributes('style="font-size: 10px"')

A B C D E
0 1.000000 1.329212 nan -0.316280 -0.990810
1 2.000000 -1.070816 -1.438713 0.564417 0.295722
2 3.000000 -1.626404 0.219565 0.678805 1.889273
3 4.000000 0.961538 0.104011 nan 0.850229
4 5.000000 1.453425 1.057737 0.165562 0.515018
5 6.000000 -1.336936 0.562861 1.392855 -0.063328
6 7.000000 0.121668 1.207603 -0.002040 1.627796
7 8.000000 0.354493 1.037528 -0.385684 0.519818
8 9.000000 1.686583 -1.325963 1.428984 -2.089354
9 10.000000 -0.129820 0.631523 -0.586538 0.290720

## Interactive outputs¶

We can even do the same for interactive material. Below we’ll display a map using folium. When the notebook is converted to Markdown, the code for creating the interactive map is retained.

Note that this will only work for some packages. They need to be able to output standalone HTML/Javascript, and not depend on an underlying Python kernel to work.

import folium

m = folium.Map(
location=[45.372, -121.6972],
zoom_start=12,
tiles='Stamen Terrain'
)

folium.Marker(
location=[45.3288, -121.6625],
icon=folium.Icon(icon='cloud')

folium.Marker(
location=[45.3311, -121.7113],
popup='Timberline Lodge',
icon=folium.Icon(color='green')

folium.Marker(
location=[45.3300, -121.6823],
popup='Some Other Location',
icon=folium.Icon(color='red', icon='info-sign')

m

Make this Notebook Trusted to load map: File -> Trust Notebook

## Rich outputs from notebook cells¶

Because notebooks have rich text outputs, you can store these in your Jupyter Book as well!

# The ! causes this to run as a shell command
!jupyter -h

usage: jupyter [-h] [--version] [--config-dir] [--data-dir] [--runtime-dir]
[--paths] [--json] [--debug]
[subcommand]

Jupyter: Interactive Computing

positional arguments:
subcommand     the subcommand to launch

optional arguments:
-h, --help     show this help message and exit
--version      show the versions of core jupyter packages and exit
--config-dir   show Jupyter config dir
--data-dir     show Jupyter data dir
--runtime-dir  show Jupyter runtime dir
format.
--json         output paths as machine-readable json
--debug        output debug information about paths

Available subcommands: bundlerextension dejavu kernel kernelspec migrate
nbconvert nbextension notebook run server serverextension troubleshoot trust


## Formatting code cells¶

### Scrolling cell outputs¶

The traditional Jupyter Notebook interface allows you to toggle output scrolling for your cells. This allows you to visualize part of a long output without it taking up the entire page.

You can trigger this behavior in Jupyter Book by adding the following tag to a cell’s metadata:

{
"tags": [
"scroll-output",
]
}


For example, the following cell has a long output, but will be scrollable in the book:

for ii in range(40):
print(f"this is output line {ii}")

this is output line 0
this is output line 1
this is output line 2
this is output line 3
this is output line 4
this is output line 5
this is output line 6
this is output line 7
this is output line 8
this is output line 9
this is output line 10
this is output line 11
this is output line 12
this is output line 13
this is output line 14
this is output line 15
this is output line 16
this is output line 17
this is output line 18
this is output line 19
this is output line 20
this is output line 21
this is output line 22
this is output line 23
this is output line 24
this is output line 25
this is output line 26
this is output line 27
this is output line 28
this is output line 29
this is output line 30
this is output line 31
this is output line 32
this is output line 33
this is output line 34
this is output line 35
this is output line 36
this is output line 37
this is output line 38
this is output line 39


### Scrolling cell inputs¶

If your input code is long and takes up a lot of your page, you can make it scrollable as well by adding the following tag to a cell’s metadata:

{
"tags": [
"scroll-input",
]
}


For example, the following cell has a long input, but will be scrollable in the book:

b = "This line has no meaning"
b = "This line has no meaning"
b = "This line has no meaning"
b = "This line has no meaning"
b = "This line has no meaning"
b = "This line has no meaning"
b = "This line has no meaning"
b = "This line has no meaning"
b = "This line has no meaning"
b = "This line has no meaning"
b = "This line has no meaning"
b = "This line has no meaning"
b = "This line has no meaning"
b = "This line has no meaning"
b = "This line has no meaning"
b = "This line has no meaning"
b = "This line has no meaning"
b = "This line has no meaning"
b = "This line has no meaning"
b = "This line has no meaning"
b = "This line has no meaning"
print(b)

This line has no meaning