RTMP: check if stream is online with Python

I have several Flash streams and I want to display only active/live/online streams. Can someone provide sample code that can check status of stream? or point out where I can grab it (I think Red5 and RTMPy should have this, but I completely don't have any experience with RTMP; there is also RTMP specifi开发者_StackOverflow中文版cation, but wiki says it is incomplete)? My target language is Python, but code in any language will be helpful.

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In case of connection lost or connection fail the code below will print error message.

from twisted.internet import reactor
from rtmpy.client import ClientFactory

reactor.connectTCP('localhost', 1935, ClientFactory())
reactor.run()