WSGI server vs Web Server

[chrisdb]

- can I run a wsgi server, without using a web server to run a webapp (i.e. run an angular spa with a rest api in flask with waitress alone)?

The work flow with eg Flask is building the web-app is all done local with Development Server(wsgi) that come with Flask.
If want to share with the world then get a host and then leave development server and then eg go for good option like Gunicorn and Nginx.
Look at this post for host recommendations.

WSGI Servers for a little history.
As a note there no need to dig into WSGI specification,unless you want build yet another Python web-framework.

WSGI is by design a simple standard interface for running Python code.
As a web developer you won't need to know much more than

• what WSGI stands for (Web Server Gateway Inteface)
  
  
• that a WSGI container is a separate running process that runs on a different port than your web server
  
  
• that a WSGI container is a separate running process that runs on a different port than your web server
  your web server is configured to pass requests to the WSGI container which runs your web application,
  then pass the response (in the form of HTML) back to the requester
  

I don't have the intention to share my SPA with the world.
The application I've written is for local use only. So only 1 user at a time is required. That's why I asked if it is necessary to use a web server if I already have a wsgi server.

Btw I refer to waitress because I want to run my app on Windows too.