Jupyter 101

Note

If you’re using a MacBook, replace ctrl with cmd.

Shortcuts for Cells

For the following commands, make sure you’re in command mode. You can enter this mode by pressing esc.

• a: create a cell above
• b: create a cell below
• dd: delete current cell
• m: convert a cell to markdown (text cell)
• y: convert a cell to code

Running Cells

For individual cells,

• ctrl + return: run the current cell
• shift + return: run the current cell and move to the next cell

To run all cells in a notebook:

• In the menu bar on the left, click Run. From here, you have several options. The ones we use most commonly are:

  • Run All Above Selected Cell: this runs every cell above the selected cell
  • Run Selected Cell and All Below: this runs the selected cell and all cells below
  • Run All: this runs every cell in the notebook from top-to-bottom

Saving your notebook

Jupyter autosaves your work, but there can be a delay. As such, it’s a good idea to save your work as often as you remember and especially before submitting assignments. To do so, press ctrl + s.

Restarting Kernel

In the menu bar on the left, click Kernel. From here, you have several options. The ones we use most commonly are:

• Restart Kernel...
• Restart Kernel and Run up to Selected Cell
• Restart Kernel and Run All Cells

Automatically Closing Brackets

Many IDEs like VSCode have a functionality that automatically closes brackets. For example, pressing (, {, or [ would automatically add the second bracket at the other end ), }, and ], respectively. Datahub does not have this functionality turned on by default, but you can do so by going into Settings -> Auto Close Brackets. If you see a check mark to the left of Auto Close Brackets, then it’s enabled.