[C++-sig] create a python object from scratch in boost.python?

[Gary Oberbrunner]

I'd like to create a python object with some attributes in C++, and return it to python.  Something like this:

    Plugin_Info *pinfo = get_plugin_info_i(i);
    bp::object plugin;  // this creates None; how can I make an empty class?
    plugin.attr("name") = std::string(pinfo->plugin_name);
    plugin.attr("category") = std::string(pinfo->category);
    plugin.attr("n_effects") = (int)pinfo->n_effects;
    plugin.attr("n_inputs") = (int)pinfo->n_inputs;
    plugin.attr("custom_p") = (int)pinfo->custom_p;
    effect_list.append(plugin);

But this fails on the third line, because the "plugin" object is None, and None has no attributes.  Instead of None, I'd like to create a simple empty python class I can add attributes to.  How can I do that?  (Yes, I could use a dict instead but the python side would like to see attributes with values rather than a dict.)

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Gary Oberbrunner           garyo at genarts.com
VP Engineering             Tel: 617-492-2888
GenArts, Inc.              www.genarts.com