Overview
JupyterLab 4.3, released on February 1, 2025, improves the user experience and editor performance.
Main Features
Improved editor
The code editor benefits from better syntax highlighting performance and kernel-based auto-completion.
python
# JupyterLab 4.3 - improved auto-completion
# The editor provides contextual completions
# based on the active Python kernel
import pandas as pd
df = pd.DataFrame({'a': [1, 2], 'b': [3, 4]})
# Typing df. triggers auto-completion
print(df.describe())User interface
The interface is more responsive with better dark mode support and customizable keyboard shortcuts.
python
# Installation and launch
# pip install jupyterlab==4.3
# jupyter lab
# Keyboard shortcuts configuration
# Settings > Keyboard Shortcuts
# Theme customization
# Settings > Theme > Dark