post-checkout hook to remove old pyc files and avoid errors

post-checkout.sh

# post-checkout hook (on <path-to-project>/.git/hooks/post-checkout file) 
# to avoid errors for old pyc files when checkout.
# Remember execution privileges (chmod +x <path-to-project>/.git/hooks/post-checkout).

#!/bin/bash
# Start from the repository root
cd ./$(git rev-parse --show-cdup)
# Delete pyc and empty directories
echo "[post-checkout] Deleting .pyc and empty directories"
find . -name "*.pyc" -delete
find . -type d -empty -delete