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The jupyter notebook is a great tool for experimenting with python code and document it in one go.

A notebook consists of cells that have Code or Markdown text in it.

Keyboard shortcuts

  • dd delete cell
  • a paste a new empty cell above the current cell
  • b paste a new empty cell below the current cell
  • y change cell type to code
  • m change cell type to markdown
  • c copy cell
  • v paste copied cell below current cell
  • h show help
  • <esc> Leave cell context
  • <enter> Enter cell context
  • <shift><enter> Run cell code or render markdown.

Other tricks

To execute shell command start the cell with a !

E.g. to install a new module:

!pip install <modulename>
Time a command with output
time <commmand>
Time a command running it 100000 times, no output
%timeit <commmand>