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    <blockquote> <p>return value for the send that succeeds = 35 return value for the send that FAILS = 32</p> <p>Documentation says that successful send should return None.</p> </blockquote> <p>No it doesn't. <a href="http://docs.python.org/library/socket.html#socket.socket.send" rel="nofollow">Documentation</a> says:</p> <blockquote> <p><strong>Returns the number of bytes sent.</strong> Applications are responsible for checking that all data has been sent; if only some of the data was transmitted, the application needs to attempt delivery of the remaining data. For further information on this concept, consult the Socket Programming HOWTO.</p> </blockquote> <p>You still haven't explained what you mean by "FAILS". The <code>send</code> call is returning successfully, and it's almost certainly placed 32 bytes into the socket write buffer.</p> <p>If the only reason you think it's failing is that it returns the correct value, then the answer is obviously that it's not failing.</p> <p>If something else is going wrong, there are all kinds of things that could be wrong at a higher level. One likely one is this: The server (especially if it was coded by someone who doesn't understand sockets well) is coded to expect one <code>recv()</code> of 35 bytes, and one <code>recv()</code> of 32 bytes. But it's actually getting a single <code>recv()</code> of 67 bytes, and waiting forever for the second, which never comes. There is no rule guaranteeing that each <code>send()</code> on a stream (TCP) socket corresponds to one <code>recv()</code> on the other side. You need to create some kind of stream protocol that demarcates the separate messages.</p> <p>Meanwhile, the quote you're referring to is irrelevant. It's describing how client sockets are used by simple web browsers: They make a connection, do one send, receive all the data, then destroy the connection. I can see why it misled you, and you may want to file a documentation bug to get it improved. But for now, just ignore it.</p> <p>If you want to make absolutely sure that the client is sending the right data, and the problem is in the server, there are two easy ways to do that:</p> <ol> <li><p>Use <a href="http://en.wikipedia.org/wiki/Netcat" rel="nofollow">netcat</a> as a trivial substitute server (e.g., <code>nc -kl 6000</code>, replacing the "6000" with the actual port) and making sure it logs what you think the server should be seeing.</p></li> <li><p>Use <a href="http://www.wireshark.org/" rel="nofollow">Wireshark</a> to watch the connection between the client and server.</p></li> </ol> <p>Once you've verified that the problem is on the server side, you need to debug the server. If you need help with that, that's probably best done in a new question, where you can post the server code instead of the client, and explain (with a link here) that you're sure the client is sending the right information.</p>
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    1. POCan the python client tcp socket be used for multiple sends?
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    1. POCan the python client tcp socket be used for multiple sends?
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    1. COYes.. I am not sure what I was reading.
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    2. COI don't see the second message being recieved on the server.
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    3. COI will look into whether , thats whats happening(ie: the server is unable to distinguish between the 2), definitely a possibility.
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