How do I install sniffio in Python?

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

Why causes the 'No module named sniffio' error?

This error occurs when the python interpreter cannot locate the `sniffio` 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 'sniffio'

ModuleNotFoundError: No module named 'sniffio'

Recommended: Install via pip into your active environment.

python -m pip install sniffio

Verification

Command

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

Expected output

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