Signature introspection from docstring

Hello List,

I want to expose a Python module via XML-RPC to a C++ program and want my server to provide function
signatures with type information. 
The signature should be automatically generated and all methods in the module are extensively documented
with ":param:" and ":type:".
For now, I use regular expressions to extract the description but I wonder if I can also use the docutils. Can
anybody give me a hint 
at which part of docutils to look if this is possible? 

Best,
Stefan
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