How do I install pynacl in Python?

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

Why causes the 'No module named pynacl' error?

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

ModuleNotFoundError: No module named 'pynacl'

Recommended: Install via pip into your active environment.

python -m pip install pynacl

Verification

Command

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

Expected output

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