我有C ++类及其对boost :: python:
的包装器class CApp
{
public:
virtual bool FOOs (){}; //does not matter for now
bool Run( const char * First,const char * Last)
{
...
return "Running..."
};
struct pyApp : CApp, wrapper<CApp> //derived class
{
... // wrappers for virtual methods
}
#include <boost/python.hpp>
using namespace boost::python;
BOOST_PYTHON_MODULE( myApp )
{
class_<pyApp, boost::noncopyable>("CApp", init<>() )
...
.def("Run",&pyMOOSApp::Run);
}
编译没问题。但是当我调用Python代码时
from myApp import *
class pyApp(CApp):
def __init__(self):
print "INIT-->"
CClass = CApp()
pyClass = pyApp()
CClass.Run('myApp','bar')
pyClass.Run('myApp','bar')
我有一个错误:
INIT-->
Running... // this is from CClass.Run
Traceback (most recent call last):
File "./pytest.py", line 18, in <module>
pyClass.Run('myApp','bar')
Boost.Python.ArgumentError: Python argument types in
CApp.Run(pyApp, str, str)
did not match C++ signature:
Run(CApp {lvalue}, char const*, char const*)
所以我试图为Run方法编写一个包装器,它将str转换为放在派生类c ++代码中的char:
bool Run(std::string a, std::string b) {
char * cstrA;
char * cstrB;
cstrA = new char[a.size()+1];
cstrB = new char[b.size()+1];
strcpy(cstrA,a.c_str());
strcpy(cstrB,b.c_str());
return this -> CApp::Run(cstrA, cstrB);
}
但唯一的变化是在最后一击:
did not match C++ signature:
Run(pyApp {lvalue}, std::string, std::string)
我很确定一个包含Run方法的错误包装,所以任何帮助都会受到赞赏。 谢谢。
答案 0 :(得分:0)
我刚看到你的另一个问题(Using derived class (C++) by Python BOOST),并相信这有同样的解决方案。如果在派生类中提供init,则需要在基类上调用init()。请在此处查看我的解决方案 - https://stackoverflow.com/a/14742937/82896。