如何在JupyterLab Notebook中移除In[]与Out[]单元格标签？

Great question! I totally get wanting to clean up the notebook UI and avoid Git clutter from those prompts—they can really bloat diffs when cell order changes. Here are a few reliable ways to remove them while keeping your line numbers intact:

Solution 1: Custom CSS (Quick Fix for Classic Notebook) #

This is the fastest way to hide prompts without messing with config files. Here's how:

• Locate or create the custom.css file in your Jupyter profile folder. It’s usually at ~/.jupyter/custom/custom.css (create the custom directory if it doesn’t exist).
• Add the following CSS code to hide both input and output prompts:

/* Hide input prompts (In[..]) */
div.input_area .prompt.input_prompt {
    display: none;
}

/* Hide output prompts (Out[..]) */
div.output_area .prompt.output_prompt {
    display: none;
}

• Restart your Jupyter Notebook server for the changes to take effect. Your line numbers will stay visible since you already have lineNumbers:true enabled in your config.

Solution 2: Modify Jupyter Configuration File #

If you prefer using Python-based config settings:

• Generate the config file if you haven’t already by running this in your terminal:

jupyter notebook --generate-config

• Open the generated file (typically ~/.jupyter/jupyter_notebook_config.py) in a text editor.
• Add these lines to replace the prompts with empty strings (effectively hiding them):

# Remove input prompts
c.CodeCell.input_prompt = ''

# Remove output prompts
c.CodeCell.output_prompt = ''

• Save the file and restart your notebook server. This will clean up the UI and eliminate Git diff noise from prompt number changes.

Solution 3: JupyterLab Settings (If Using JupyterLab) #

If you’re using JupyterLab instead of the classic notebook:

• Open the Advanced Settings Editor (click the gear icon in the left sidebar).
• Select Notebook from the list of settings.
• In the User Preferences tab, add this JSON snippet to hide prompts:

{
  "codeCellConfig": {
    "inputPrompt": "",
    "outputPrompt": ""
  }
}

• Save the settings—changes will apply immediately. Your line numbers remain visible as configured.

All these methods will remove the In[..]/Out[..] prompts while preserving your line numbers. This should also fix the Git history issue since prompt numbers won’t change when you reorder or edit cells.

内容的提问来源于stack exchange，提问作者M.R.