我编写了一个包含一些类的库,这些类使用qt对象,如QVector,QColor等,而不继承它们。现在我想让这些(部分)对象可用于python。我首先尝试过SIP,但是文档记录很少,甚至无法构建示例。现在我正在尝试使用boost.python,它适用于标准c ++类。
然而,一旦我开始包含Qt的东西,它仍然编译,但无法导入到python。这是一个最小的例子:
testclass.h
#include <QDebug>
#include <QVector>
#include <QColor>
class testclass
{
public:
testclass();
const char* output();
QVector<double> & data();
static int x(){return 1;}
QColor * c();
private:
QVector<double> v;
};
struct stat;
testclass.cpp
#include "testclass.h"
testclass::testclass()
{
}
const char* testclass::output()
{
qDebug() << "string";
return "hello";
}
QVector< double >& testclass::data()
{
return v;
}
QColor* testclass::c()
{
return new QColor();
}
testclassBoost.cpp
#include "testclass.h"
#include <boost/python.hpp>
using namespace boost::python;
BOOST_PYTHON_MODULE(libtestclass)
{
// Create the Python type object for our extension class and define __init__ function.
class_<testclass>("testclass", init<>())
.def("output", &testclass::output) // Add a regular member function.
;
}
CMakeList.txt
project(boostpythontest)
cmake_minimum_required(VERSION 2.8)
find_package(Qt4 REQUIRED)
FIND_PACKAGE(Boost 1.45.0)
IF(Boost_FOUND)
SET(Boost_USE_STATIC_LIBS OFF)
SET(Boost_USE_MULTITHREADED ON)
SET(Boost_USE_STATIC_RUNTIME OFF)
FIND_PACKAGE(Boost 1.45.0 COMPONENTS python)
ELSEIF(NOT Boost_FOUND)
MESSAGE(FATAL_ERROR "Unable to find correct Boost version. Did you set BOOST_ROOT?")
ENDIF()
include_directories(${QT_INCLUDES} ${CMAKE_CURRENT_BINARY_DIR} ${Boost_INCLUDE_DIRS} "/usr/include/python2.7")
set(SRCS
testclass.cpp
testclassBoost.cpp
)
add_library(testclass SHARED ${SRCS})
target_link_libraries(testclass ${Boost_LIBRARIES} ${QT_QTCORE_LIBRARY})
现在尝试导入生成的库会导致以下错误:
Python 2.7.2 (default, Jun 27 2011, 14:59:25)
[GCC 4.4.5] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import libtestclass
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: ./libtestclass.so: undefined symbol: _ZN6QColor10invalidateEv
有趣的是,一些qt类没有问题。如果没有函数c(),它可以正常工作(QVector没问题)。我能做些什么来完成这项工作?我不打算在python中使用qt的任何函数,但我想在c ++的库中只使用qt。
答案 0 :(得分:1)
QColor
需要QtGui,而不仅仅是QtCore。