The WSGIRestrictEmbedded directive determines whether mod_wsgi embedded mode is enabled or not.
If set to ‘On’ and the restriction on embedded mode is therefore enabled, any attempt to make a request against a WSGI application which hasn’t been properly configured so as to be delegated to a daemon mode process will fail with a HTTP internal server error response.
This option does not exist on Windows, or Apache 1.3 or any other configuration where daemon mode is not available.
The WSGIRestrictEmbedded directive turns off Python in the Apache worker processes since you are using a daemon process group. Saves on memory and CPU startup cost of worker processes