Jupyter

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

First select a cell (click left from the editing area), then:

• <shift>j Select next cell too
• dd delete
• 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
• 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>