Jupyter Notebook Cheat Sheet

Jupyter Notebook reference covering magic commands, shell integration, cell types, and essential keyboard shortcuts for efficient interactive computing.

1 PageBeginnerMar 25, 2026

Common Magic Commands

Line and cell magics for the IPython kernel.

python

%matplotlib inline           # render plots inline%timeit sum(range(1000))     # time a single line%%time                       # time a whole cell (must be first line)%who                         # list variables in the current namespace%load_ext autoreload%autoreload 2                # auto-reload modules on change!pip install requests        # run a shell command

Cell Magics & Shell

Write files and run shell scripts from a cell.

python

%%writefile script.pyprint("hello from a generated file")%%bashecho "runs as a bash script"ls -la%run script.py                # execute an external .py file%pwd                           # print working directory

Keyboard Shortcuts

Command mode shortcuts (press Esc first).

Esc, A- insert a new cell above
Esc, B- insert a new cell below
Esc, D D- delete the selected cell
Shift+Enter- run cell and select the next one
Ctrl+Enter- run the cell in place
Esc, M- convert cell to Markdown
Esc, Y- convert cell to code

Cell & Kernel Concepts

Building blocks of a notebook document.

Code cell- executes in the kernel and shows output below
Markdown cell- renders formatted text, LaTeX, and images
Raw cell- passed through unmodified during nbconvert (no execution)
Kernel- the language runtime (ipykernel for Python) executing your code
Checkpoint- autosaved notebook snapshot used for recovery

Pro Tip

Restart the kernel and run all cells top-to-bottom (Kernel > Restart & Run All) before trusting a notebook's results — out-of-order execution during interactive editing easily leaves you with state that won't reproduce from a fresh run.

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