Control activated webservices
Usually you have a webserver (Apache, nginx...) before that. Depending on the webserver and OS it can be rather easy to deactivate a site. For example Ubuntu + Apache

configure a default host that returns only 503 Service Unavailable
configure a site configuration with a VirtualHost with the actual WSGI setup for the webservice
activate the website with a2ensite <name> and service apache2 reload
activate the website with a2dissite <name> and service apache2 reload

But there are very many other solutions to your problem.
i'm new in all of webservices and more webservices with python.
I tested bottle, ladon, flask and django REST framework... With different opinions but all working more or less fine. Now i need to have something like a admin view to start or stop these services. Looking these frameworks i cant find anything about it.
I searched here and neither. 
So i was looking for something like admin django view where i can start o stop a service. Which framework or technology do you recommend me?
thank you.