Jupyter notebook code cells can contain special commands which are not valid Python code but affect the behavior of the notebook. These special commands are called magic commands.
One of the most popular magic commands is:
%matplotlib inline command at the top of a Jupyter notebook renders Matplotlib plots in cells of the notebook. Without
%matplotlib inline, plots may jump out as external windows. A typical start to a Jupyter notebook using Matplotlib might start as:
import numpy as np import pandas as pd import matplotlib.pyplot as plt %matplotlib inline
%load command loads a Python module, webpage or file into a Jupyter notebook. If there is a file called hello.py in the same directory as the notebook with some Python code written in it, we can load that same code into a Jupyter notebook code cell with the
Within a Jupyter notebook code cell type the command:
The result is the code from the file hello.py is copied into the current notebook.
# %load hello.py # hello.py print('This code was run from a seperate Python file') print('Hello from the file hello.py')
This code was run from a seperate Python file Hello from the file hello.py
%run magic command followed by the name of a valid Python file, the Python file runs as a script. Suppose the file hello.py is created in the same directory as the running Jupyter notebook. The directory structure will look something like this:
| folder ---| notebook.ipynb ---| hello.py
In the file hello.py is the code:
# hello.py print('This code was run from a separate Python file') print('Hello from the file hello.py')
Within our Jupyter notebook, if we
%run this file, we get the output of the hello.py script in a Jupyter notebook output cell.
This code was run from a separate Python file Hello from the file hello.py
Other useful magic commands
Below is a table of other useful Jupyter notebook magic commands
|%pwd||Print the current working directory|
|%cd||Change the current working directory|
|%ls||List the contents of the current directory|
|%history||Show the history of the
You can list all of the available magic commands by typing and running
%lsmagic in a Jupyter notebook code cell:
The output shows all the available line magic commands that begin with the percent sign
Available line magics: %alias %alias_magic %autocall %automagic %autosave ... %dhist %dirs %doctest_mode %ed %edit %env %gui ... dir %more %mv %notebook %page %pastebin %pdb %pdef ... ... Available cell magics: %%! %%HTML %%SVG %%bash %%capture %%debug %%file %%html ... %%python %%python2 %%python3 %%ruby %%script %%sh %%svg ...