flask cors policy no 'access-control-allow-origin'

To resolve the "flask cors policy no 'access-control-allow-origin'" issue, follow these steps:

1. Install the Flask-CORS extension using pip:

pip install flask-cors

1. Import the CORS module in your Flask application:

from flask_cors import CORS

1. Initialize CORS with your Flask app:

CORS(app)

1. Optionally, configure CORS to allow specific origins:

CORS(app, resources={r"/api/*": {"origins": "http://example.com"}})

1. Restart your Flask application and test the CORS policy.