Does Flask create a Web server?

Although Flask has a built-in web server , as we all know, it’s not suitable for production and needs to be put behind a real web server able to communicate with Flask through a WSGI protocol. A common choice for that is Gunicorn—a Python WSGI HTTP server.

Warning Flask uses a simple web server to serve our application in a development environment, which also means that the Flask debugger is running to make catching errors easier.

Web services can be generally regarded as functions or functionality of applications or systems exposed over the Web using standardised message formats and typically interfaced to other software using traditional APIs , although “message-centric” usage of such services is also possible and may be favoured by certain …