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Should be a small project for an experienced social graph coder, so bid accordingly.
I have a database (mysql) with messages send from user to user. The (directed) communication network may be constructed through a variety of program languages, but with a preference for Python or PHP. Edges have a weight. This weight is given, so no need to calculate. Edges can have different colors, based on fixed intervals (for weight). Size of nodes depends on the number of messages a certain person (here node) a person posted. Nodes are labeled by the name of their user. Clicking on the resulting edges in graph should show the content of message (eg in popup).
The resulting network should organise itself in an appealing way (see example for network without previously mentioned labels etc). This one was drawn witt [url removed, login to view] .
Code should be well documented, so that changes to the code can be made afterwards.