The jupyterlab-lsp extension offers this as an opt-in feature. After installing the extension in JupyterLab 3.0+ (which is two part: jupyterlab-lsp
and the language server of your choice – see the linked instructions) you need to enable it in Advanced Settings Editor
→ Code Completion
→ continuousHinting
:
Disclaimer: I am one of the authors. This feature is still under development.