app/assets.py
from flask_assets import Bundle
app_css = Bundle('app.scss', filters='scss', output='styles/app.css')
app_js = Bundle('app.js', filters='jsmin', output='scripts/app.js')
vendor_css = Bundle('vendor/semantic.min.css', output='styles/vendor.css')
vendor_js = Bundle(
'vendor/jquery.min.js',
'vendor/semantic.min.js',
'vendor/tablesort.min.js',
'vendor/zxcvbn.js',
filters='jsmin',
output='scripts/vendor.js')