how to use parameters of class_ from boost.python

Question

The first question: The class_ class has four parameters.

class template class_<T, Bases, HeldType, NonCopyable>

I don't understand the parameters of Bases and HeldType.How to use the parameters. this doc: http://www.boost.org/doc/libs/1_51_0/libs/python/doc/v2/class.html

The second question: I have to make a python function as callback of a c++ function.How to do?Where can I find some examples??

`Bases` - base classes for T in python as in C++. `HeldType` in most cases is T. — ForEveR, Sep 02 '12 at 14:10
Bases C++ base classes from T?HeldType is a class derived from T.But I don't know what work and effect with the two parameters. — simon, Sep 02 '12 at 14:25
If T is a class derived,must work with parameter of Bases？The HeldType derived from T,what did it do. — simon, Sep 02 '12 at 15:15

score 0 · Accepted Answer · answered Sep 07 '12 at 13:54

The HeldType is usefull, if you want to use a special object to hold your object. For e.g. if you use shared_ptr<> inside your implementation you can use this as HeldType.

If you have no idea what shared_ptr are, just google for them, they are a nice tool.

Further descriptions as an example for the shared_ptr<> as HeldType can be found here: Python Wiki, deailing with smart pointers

how to use parameters of class_ from boost.python

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