How do I install h11 in Python?

The standard way to install h11 is by running `python -m pip install h11`. If you are using Anaconda, use `conda install -c conda-forge h11`.

Why causes the 'No module named h11' error?

This error occurs when the python interpreter cannot locate the `h11` package. It is often caused by missing installation or environment mismatch (e.g. installing in global but running in venv).

How to fix ModuleNotFoundError: No module named 'h11'

ModuleNotFoundError: No module named 'h11'

Recommended: Install via pip into your active environment.

python -m pip install h11

Verification

Command

python -c "import h11; print(h11.__version__)"

Expected output

Success! h11 version x.y.z (e.g., 2.4.0)