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Jupyter

I currently run a Oracle VirtualBox on a MacOS and have the network setting for Adapter 1 set as bridged over the wifi interface (en0). Doing so, I get a DHCP address for my local network at the same level as the MacOS computer. This allows me to use that IP for sharing the jupyter and bokah servers from the VM to a local browser on the MacOS. In this documentation, I assume the VM is on the address 192.168.131.54.

Launching a jupyterlab session, I prefer not to have it try and start a browser from the VM. The default port is 8888.

$ conda activate <env>
(env) $ jupyter lab --ip=192.168.131.54 --no-browser

A jupyterlab can be started for each conda enviroment, but do not attempt to open the same notebook file between two jupyterlab instances. It will do it, but will cause odd things to happen.

To enable multiple environments, use separate ports via (--port). It turns out jupyterlab is able to figure out other ports are busy and auto increments the port number. Specifying the port number is not necessary unless you want it to be really different.

(env) $ jupyter lab --ip=192.168.131.34 --port=8889 --no-browser

To test a bokeh application to make sure it can be embedded in a jupyter lab notebook with working interactive widgets, use this example script.

Using the above default launching of jupyter lab, the last line of the notebook should read:

show(bkapp, notebook_url="http://192.168.131.54:8888")

Jupyter Shortcuts

You can install the shortcuts within JupyterLab web interface through Settings, Advanced Setting Editor and Keyboard Shortcuts and edit the "User Preferences" pane or copy "shortcuts.jupyterlab-settings" to:

${HOME}/.jupyter/lab/user-settings/@jupyterlab/shortcuts-extension/shortcuts.jupyterlab-settings

NOTE: The location of this may be different on other systems.

The following keyboard shortcuts are added to the notebook editor (one we are just calling out):

  • Ctrl Shift ArrowUp: move cell up
  • Ctrl Shift ArrowDown: move cell down
  • Ctrl Shift E: Restart kernel and run all cells
  • Ctrl Shift R: Restart kernel and clear all cells
  • Ctrl Shift Q: Shutdown and close current notebook (jupyter default)
  • Ctrl Shift K: Shutdown jupyter

For cell movement, you must not be editing the cell. The cell to move must be selected just to the left and is denoted by a vertical bar highlighting the cell.