When you run 'dev_appserver.py', the local development server will now run and listen for requests on port *8080*. Port 8000 is your admin server as per your attached image.
INFO 2018-05-20 17:12:53,171 dispatcher.py:255] Starting module "default" *running* at: *http://localhost:8080* INFO 2018-05-20 17:12:53,187 admin_server.py:152] Starting admin server at: http://localhost:8000 -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to google-appengine@googlegroups.com. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/f72fabe8-8af4-45c8-a7d9-ed6113a4c62a%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
