How do I install tornado in Python?

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

Why causes the 'No module named tornado' error?

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

ModuleNotFoundError: No module named 'tornado'

Recommended: Install via pip into your active environment.

python -m pip install tornado

Verification

Command

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

Expected output

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