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Confusion regarding a simple python wsgi server (wsgiref.simple_server)

This is a simple wsgi python server that outputs Hello guys!!!to 0.0.0.0:8080.

from wsgiref.simple_server import make_server

content = 'Hello guys!!!'

def application(environ, start_response):
    start_response('200 OK', [('Content-Type', 'text/plain')])
    return [content]

server = make_server('0.0.0.0', 8080, application)
server.serve_forever()

When considering this code, several questions arise:

  • How does a function make_serverwork only with a function name application? I do not see how this does anything else, and then returns a string "<function application at 0x7f71686286e0>"(of application.__repr__() methoda function object).

  • Why environdoes an application function definition be defined as an argument when it is not used inside this function and is not even set in a function call applicationlater?

  • , , start_response , , , make_server. ? ( , , )

: environ , start_response, , , start_response application .

, os.environ - , , python. environ , , , (environ), , . " , " , , .

- Ned , , make_server('0.0.0.0', 8080, application) WSGIServer, wsgiref.simple_server.WSGIServer((host, port), handler_class)). , , BaseServer. BaseServer server_address RequestHandlerClass . application application WSGIServer.

, application - python. ( , WSGIServer) - , ? , .

+5
1

Python , , , :

>>> def double(x):
...     return 2*x
...

>>> my_fn = double
>>> my_fn(4)
8

, , .

:

server = make_server('0.0.0.0', 8080, application)

application - , make_server, . . , application, , start_response. , WSGI, ,

start_response('200 OK', [('Content-Type', 'text/plain')])

application , start_response. , WSGI. WSGI , , , .

+3

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