Jupyter cheatsheet

Jupyter: IPython magics and tips

8 common Jupyter tasks.

Time a statement

Run a statement many times and report the average. %%timeit does the same for a whole cell.

%timeit sum(range(1000))

Report how long the whole cell took to run once.

%%time
result = sum(range(10_000_000))

Display Matplotlib charts below the cell.

%matplotlib inline

Pick up changes to imported .py files without restarting the kernel.

%load_ext autoreload
%autoreload 2

Prefix a command with ! to run it in the shell.

!ls -lh data/

Append ? to see documentation, or ?? to see the source.

pd.DataFrame.merge?

Show several values in one cell, such as DataFrames and images.

from IPython.display import display

display(df.head(), df.describe())

Show the variables defined in the notebook.

%whos