No library stub file for module lxml.html in python

Question

Upon adding this line import lxml.html vim displays No library stub file for module lxml.html.

What does it mean?

Answer 1

Mypy makes use of a package called TypeShed. Typeshed contains type stubs for the python standard library and a few third party packages. lxml isn't represented there. So the type checker doesn't know about the types within lxml.

Stubs are explained here: https://github.com/python/mypy/wiki/Creating-Stubs-For-Python-Modules

Answer 2

The stub file for lxml.html was not available until version 0.2.0 (released in May 2021). You can just pip install lxml-stubs --upgrade.