`netstat` doesn't show sockets binded by python SimpleHTTPServer?

Question

A local server is run using the SimpleHTTPServer module from Python 2.7

$ python -m SimpleHTTPServer
Serving HTTP on 0.0.0.0 port 8000 ...

Then I use netstat to search for that socket using 8000 as a filter for port number, however, I can't find any socket with the filter (even when I open a browser window and access 127.0.0.1:8000).

$ netstat | grep 8000
// "return Nothing"

Does anyone have ideas about why I can't see the socket binded by Python SimpleHTTPServer in netstat?

Answer 1

Extending the answer by @MK.

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By default, netstat shows only the connected ports, but NOT those which just listening idly. Hence, the confusion.
The author of netstat made the call either for simplicity or for aesthetics.

if you make a connection to that :8000 port, it will show up in just netstat call.

Else, you have to make it explicit that you want it ALL.

netstat -a | grep 8000