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  1. PO
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    <p>I think there's a couple of ways that are easier to accomplish than writing your own converter. You can use boost::python's map_indexing_suite to do the conversion for you, or you can use keyword arguments in python. I personally prefer keyword arguments, as this is the more "Pythonic" way to do this.</p> <p>So this is your class (I added a typedef for the map):</p> <pre><code>typedef std::map&lt;std::string, double&gt; MyMap; class myClass { public: // Constructors - set a-f to default values. void SetParameters(MyMap &amp;); private: double a, b, c, d, e, f; }; </code></pre> <p>Example using map_indexing_suite:</p> <pre><code>#include &lt;boost/python/suite/indexing/map_indexing_suite.hpp&gt; using boost::python; BOOST_PYTHON_MODULE(mymodule) { class_&lt;std::map&lt;std::string, double&gt; &gt;("MyMap") .def(map_indexing_suite&lt;std::map&lt;std::wstring, double&gt; &gt;() ); class_&lt;myClass&gt;("myClass") .def("SetParameters", &amp;myClass::SetParameters); } </code></pre> <p>Example using keyword arguments. This requires using a raw_function wrapper:</p> <pre><code>using namespace boost::python; object SetParameters(tuple args, dict kwargs) { myClass&amp; self = extract&lt;myClass&amp;&gt;(args[0]); list keys = kwargs.keys(); MyMap outMap; for(int i = 0; i &lt; len(keys); ++i) { object curArg = kwargs[keys[i]]; if(curArg) { outMap[extract&lt;std::string&gt;(keys[i])] = extract&lt;double&gt;(kwargs[keys[i]]); } } self.SetParameters(outMap); return object(); } BOOST_PYTHON_MODULE(mymodule) { class_&lt;myClass&gt;("myClass") .def("SetParameters", raw_function(&amp;SetParameters, 1)); } </code></pre> <p>this allows you to write stuff like this in Python:</p> <pre><code>A.SetParameters(a = 2.2, d = 4.3, b = 9.3) </code></pre>
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    1. USAleksey Vitebskiy
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    1. CO@aleksey- the keyword argument method looks optimal for what I'd like to do. However, I am having some issues with the code you posted. It looks like raw_function only likes the specified function to have as inputs a tuple and a dict. Is there a separate, similar construct for class member functions?
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    2. COoh, I see. I think I got around this by using a wrapper class that inherits from the class I'm trying to wrap.
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    3. COalso, the first argument in the args tuple should be the reference to your class. You can omit the self argument and extract myClass& from args[0]. See if that works.
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