如何在Jupyter Lab中实现多光标编辑？原Notebook用JS代码实现

Hey there! Great question—you absolutely can set up Sublime-style multi-cursor editing through Jupyter's built-in settings, no custom JS snippets required. Here's a straightforward, step-by-step guide:

For JupyterLab (Modern Interface) #

1. Open the Advanced Settings Editor
   • Click the Settings menu in the top-right corner, then select Advanced Settings Editor
   • Or use the keyboard shortcut: Ctrl+, (Windows/Linux) or Cmd+, (Mac)
2. Configure the CodeMirror key map
   • In the left sidebar, select the Notebook category
   • Look for the User Preferences panel on the right (this is where you'll add your custom settings)
   • Paste the following JSON configuration into the panel:

     {
       "codeCellConfig": {
         "cmConfig": {
           "keyMap": "sublime"
         }
       }
     }
     

3. Save and apply
   • Click the Save Settings button at the top of the editor (changes might auto-save in some versions)
   • Refresh your Notebook page, and you're all set! All new and existing code cells will use the Sublime key map, including multi-cursor features like Ctrl+Click to add multiple cursors or Alt+Drag for column selection.

For Classic Jupyter Notebook (Legacy Interface) #

If you're using the older classic Notebook interface:

1. Open Preferences
   • Click the Edit menu, then select Preferences
2. Update CodeMirror settings
   • In the pop-up settings window, find the CodeMirror Options section
   • Add "keyMap": "sublime" to the existing JSON configuration (make sure the syntax is valid—commas matter!)
3. Save and restart
   • Click Save to apply the changes, then restart your Notebook server for the settings to take effect.

Why This Is Better Than the Custom JS Snippet #

This built-in setting is persistent—you won't need to re-run a code snippet every time you open a Notebook. It also applies globally to all cells and new Notebooks, so you don't have to manually update each cell like you did with the JS loop.

内容的提问来源于stack exchange，提问作者Seanny123