_swig_getattr AttributeError

Question

在python代码中使用swig包装c函数时，我遇到了一个属性错误。除了chap之外，我还有其他函数可以很好地工作，但是有一些奇怪的原因这个函数不能工作:/

我正在尝试使用CGAL来确定所有粒子的凸包(chap)。以下是chap函数和回溯：

std::vector<Vec2d> World::chap() const
{
    std::vector<Point_2> ch;
    std::vector<Point_2> points;
    std::vector<Vec2d> result;
    for(size_t i = 0, sz = particles.size(); i < sz; ++i)
    {
        points.push_back(Point_2(particles[i]->position.x, particles[i]->position.y));
    }
    CGAL::convex_hull_2(points.begin(), points.end(), std::back_inserter(ch));
    for(size_t i = 0, sz = ch.size(); i < sz; ++i)
    {
        result.push_back(Vec2d(ch[i].x(), ch[i].y()));
    }
    return result;
}

Traceback (most recent call last):
  File "keiro.py", line 64, in <module>
    if scenario.run():
  File "/Users/marcstrauss/Desktop/keiro/scenario.py", line 56, in run
    dt = self.world.advance()
  File "/Users/marcstrauss/Desktop/keiro/world.py", line 87, in advance
    view.add_ch(self.chap())
  File "/Users/marcstrauss/Desktop/keiro/fast/physics.py", line 312, in <lambda>
    __getattr__ = lambda self, name: _swig_getattr(self, World, name)
  File "/Users/marcstrauss/Desktop/keiro/fast/physics.py", line 34, in _swig_getattr
    raise AttributeError,name
AttributeError: chap

Answer 1

该函数是公共的吗？当我试图调用一个声明为受保护的函数时，我得到了同样的错误。The SWIG C++ manual指出，私有和受保护的函数将不会被包装