How do I remove all .pyc files from a project?

find . -name '*.pyc' -delete

Surely the simplest.

Add to your ~/.bashrc:

pyclean () {
        find . -type f -name "*.py[co]" -delete
        find . -type d -name "__pycache__" -delete
}

This removes all .pyc and .pyo files, and __pycache__ directories. It's also very fast.

Usage is simply:

$ cd /path/to/directory
$ pyclean

find . -name "*.pyc" -exec rm -f {} \;