====== source 1 ======

https://programminghistorian.org/en/lessons/creating-apis-with-python-and-flask


====== source 2 ======


https://stoplight.io/blog/python-rest-api/

====== sample1 ======

  from flask import Flask, json
  
  companies = [{"id": 1, "name": "Company One"}, {"id": 2, "name": "Company Two"}]
  
  api = Flask(__name__)
  
  @api.route('/companies', methods=['GET'])
  def get_companies():
    return json.dumps(companies)
  
  if __name__ == '__main__':
      api.run(host='0.0.0.0', port=80)

====== sample2 ======