Flask-Inliner converts CSS <style> blocks to inline style attributes
pip install flask-inliner
Download from https://github.com/Code-ReaQtor/flask-inliner/releases
python setup.py install
from flask import Flask
from flask_inliner import Inliner
app = Flask(__name__)
Inliner(app)
@app.route('/')
def hello_world():
return '<html><head><style>h1 { color:#ffcc00; }</style></head><body><h1>Hello World!</h1></body></html>'
if __name__ == '__main__':
app.run()