python3 -m venv project_env
source project_env/bin/activate
pip list
pip install packages
pip freeze > requirements.txt
deactivate
rm -rf project_env/
python3 -m venv project/venv
source project/venv/bin/activate
pip intall -r requirements.txt
# venv that can access system packages
python3 -m venv venv --system-site-packages
source venv/bin/activate
pip list
pip list --local
plt.xkcd()
print(plt.style.available)
#https://matplotlib.org/3.2.1/gallery/style_sheets/style_sheets_reference.html
plt.style.use('fivethirtyeight')
plt.tight_layout()