[Boost-users] Re: newbie: need example (call python from c++)

4 Jul 2004


      Peter Piehler  writes:
...
Hello,
I use call<void>(pyFunc,arg1,..) to call a python
function with standard double, int etc.
Please bring Boost.Python questions to the C++-sig:
http://www.boost.org/more/mailing_lists/cplussig
...
What must I do to call a function with a c++ object as
argument?
A standard double is a c++ object.  I presume you mean an instance of
a C++ class.  Just pass it to call and make sure its class has been
wrapped.
...
psydocode:
class MyAnimal
{
       /*...*/
       std::string __strName;
    public:
       MyAnimal() : __strName("Tux") {}
       /*...*/
       std::string getName()
           { return __strName;}
       void setName(const std::string &strName)
           { __strName = strName; }
};
int main()
{
  /*...*/
  MyAnimal* pTux = new Animal;
  /*do something with pTux*/
/*use a python function with pTux*/
  call<void>(pyFunc1, ?pTux? );
You can pass pTux or *pTux; that will cuase *pTux to be copied
    into a Python object.  You can pass ptr(pTux) or ref(*pTux); that
    will pass a Python object that only holds *pTux by reference (no
    lifetime management)
...
/*change attributes pTux in pyFunc2*/
  dog = call<MyAnimal>(pyFunc2, ?pTux?);
/*if it possible to call by reference?*/
  call<void>(pyFunc3, ?pTux?);
  pTux->getName();// return Cat
-- 
Dave Abrahams
Boost Consulting
http://www.boost-consulting.com

[Boost-users] Re: newbie: need example (call python from c++)

David Abrahams