If someone is interested, a made a visualization [1] of the Bitcoin P2P network using Protocoin [2]. I'll release the source code together with the next release of Protocoin.

[1] http://pyevolve.sourceforge.net/wordpress/?p=2654
[2] http://protocoin.readthedocs.org

This is the first release, so there is a long road ahead but the hard work was already implemented, which is the serialization/deserialization design to support all Bitcoin protocol details. You can implement a full Bitcoin client if you want or even a simple app to collect statistics from the network, to plot network graphs between nodes, to do studies on the P2P network like: how is a block replicated in the network, how is a transaction replicated, how many time takes to a transaction going from a node to another node, etc, there are a lot of things you can do with it and there are some of these that are in my roadmap to develop too. Thanks for the interest.

Just release Protocoin [1], a pure Python Bitcoin protocol implementation.

[1] http://protocoin.readthedocs.org/

Thanks !

Just release Protocoin [1], a pure Python Bitcoin protocol implementation.

[1] http://protocoin.readthedocs.org/

Thanks !

Why I'm receiving always zero in the txn_count field of the block message after calling it with a getdata ? Is this expected ? How can I get the transactions present in a block ?