Cython / Python - 未找到符号PyString_Type

Question

我正在尝试从cython调用C ++代码并遵循official guide。

但是，在python中导入已编译的模块时，我收到以下错误。

---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-1-ba16f97c2145> in <module>()
----> 1 import rect

ImportError: /home/userName/estCppLibrary/rect.so: undefined symbol: PyString_Type

我必须补充一点，我没有管理员权限，必须在~/.local/lib本地安装Cython。在我的私人笔记本电脑上使用sudo权限和我的代码的默认路径。

这是我的代码。

#setup.py

from distutils.core import setup
from Cython.Build import cythonize
from distutils.extension import Extension

ext = Extension(
    "rect",
    sources = ["rect.pyx", "Rectangle.cpp"],
    language = "c++",
    include_dirs=["~/.local/include"],
    library_dirs=["~/.local/lib"]
    )

setup(ext_modules = cythonize(ext))

-

#Rectangle.h

namespace shapes {
    class Rectangle {
    public:
        int x0, y0, x1, y1;
        Rectangle();
        Rectangle(int x0, int y0, int x1, int y1);
        ~Rectangle();
        int getArea();
        void getSize(int* width, int* height);
        void move(int dx, int dy);
    };
}

-

#Rectangle.cpp


namespace shapes {

Rectangle::Rectangle() { }

    Rectangle::Rectangle(int X0, int Y0, int X1, int Y1) {
        x0 = X0;
        y0 = Y0;
        x1 = X1;
        y1 = Y1;
    }

    Rectangle::~Rectangle() { }

    int Rectangle::getArea() {
        return (x1 - x0) * (y1 - y0);
    }

    void Rectangle::getSize(int *width, int *height) {
        (*width) = x1 - x0;
        (*height) = y1 - y0;
    }

    void Rectangle::move(int dx, int dy) {
        x0 += dx;
        y0 += dy;
        x1 += dx;
        y1 += dy;
    }


}

-

#rect.pyx

# distutils: language = c++
# distutils: sources = Rectangle.cpp

cdef extern from "Rectangle.h" namespace "shapes":
    cdef cppclass Rectangle:
        Rectangle() except +
        Rectangle(int, int, int, int) except +
        int x0, y0, x1, y1
        int getArea()
        void getSize(int* width, int* height)
        void move(int, int)

cdef class PyRectangle:
    cdef Rectangle c_rect      # hold a C++ instance which we're wrapping
    def __cinit__(self, int x0, int y0, int x1, int y1):
        self.c_rect = Rectangle(x0, y0, x1, y1)
    def get_area(self):
        return self.c_rect.getArea()
    def get_size(self):
        cdef int width, height
        self.c_rect.getSize(&width, &height)
        return width, height
    def move(self, dx, dy):
        self.c_rect.move(dx, dy)