Python cythonc++；例子失败了，为什么？

当我尝试在上运行该示例时，在mac终端上出现以下错误：

Error compiling Cython file:

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

cdef extern from "Rectangle.h" namespace "shapes":
cdef cppclass Rectangle:


rect.pyx:5:0: Expected an increase in indentation level
Traceback (most recent call last):
  File "setup.py", line 8, in <module>
    language="c++",                        # generate and compile C++ code
  File "/usr/local/lib/python2.7/site-packages/Cython/Build/Dependencies.py", line 877, in cythonize
    cythonize_one(*args)
  File "/usr/local/lib/python2.7/site-packages/Cython/Build/Dependencies.py", line 997, in cythonize_one
    raise CompileError(None, pyx_file)
Cython.Compiler.Errors.CompileError: rect.pyx

setup.py

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

setup(ext_modules = cythonize(Extension(
                                        "rect",                                # the extesion name
                                        sources=["rect.pyx", "Rectangle.cpp"], # the Cython source and
                                        # additional C++ source files
                                        language="c++",                        # generate and compile C++ code
                                        )))

我也尝试了以下方法：

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

setup(ext_modules = cythonize(
           "rect.pyx",                 # our Cython source
           sources=["Rectangle.cpp"],  # additional source file(s)
           language="c++",             # generate C++ code
      ))

rect.pyx

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

cdef extern from "Rectangle.h" namespace "shapes":
cdef cppclass Rectangle:
Rectangle(int, int, int, int) except +
int x0, y0, x1, y1
int getLength() const
int getHeight() const
int getArea() const
void move(int, int)

cdef class PyRectangle:
cdef Rectangle *thisptr
def __cinit__(self, int x0, int y0, int x1, int y1):
self.thisptr = new Rectangle(x0, y0, x1, y1)
def __dealloc__(self):
del self.thisptr
def getLength(self):
return self.thisptr.getLength()
def getHeight(self):
return self.thisptr.getHeight()
def getArea(self):
return self.thisptr.getArea()
def move(self, dx, dy):
self.thisptr.move(dx, dy)

# distutils: language = c++
# distutils: sources = Rectangle.cpp
cdef extern from "Rectangle.h" namespace "shapes":
    cdef cppclass Rectangle:
        Rectangle(int, int, int, int) except +
        int x0, y0, x1, y1
        int getLength()
        int getHeight()  
        int getArea()  
        void move(int, int)

cdef class PyRectangle:
    cdef Rectangle *thisptr
    def __cinit__(self, int x0, int y0, int x1, int y1):
        self.thisptr = new Rectangle(x0, y0, x1, y1)
    def __dealloc__(self):
        del self.thisptr
    def getLength(self):
        return self.thisptr.getLength()
    def getHeight(self):
        return self.thisptr.getHeight()
    def getArea(self):
        return self.thisptr.getArea()
    def move(self, dx, dy):
        self.thisptr.move(dx, dy)

---

非常感谢，斯文策尔！现在，它起作用了

rect.pyx

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

cdef extern from "Rectangle.h" namespace "shapes":
cdef cppclass Rectangle:
Rectangle(int, int, int, int) except +
int x0, y0, x1, y1
int getLength() const
int getHeight() const
int getArea() const
void move(int, int)

cdef class PyRectangle:
cdef Rectangle *thisptr
def __cinit__(self, int x0, int y0, int x1, int y1):
self.thisptr = new Rectangle(x0, y0, x1, y1)
def __dealloc__(self):
del self.thisptr
def getLength(self):
return self.thisptr.getLength()
def getHeight(self):
return self.thisptr.getHeight()
def getArea(self):
return self.thisptr.getArea()
def move(self, dx, dy):
self.thisptr.move(dx, dy)

# distutils: language = c++
# distutils: sources = Rectangle.cpp
cdef extern from "Rectangle.h" namespace "shapes":
    cdef cppclass Rectangle:
        Rectangle(int, int, int, int) except +
        int x0, y0, x1, y1
        int getLength()
        int getHeight()  
        int getArea()  
        void move(int, int)

cdef class PyRectangle:
    cdef Rectangle *thisptr
    def __cinit__(self, int x0, int y0, int x1, int y1):
        self.thisptr = new Rectangle(x0, y0, x1, y1)
    def __dealloc__(self):
        del self.thisptr
    def getLength(self):
        return self.thisptr.getLength()
    def getHeight(self):
        return self.thisptr.getHeight()
    def getArea(self):
        return self.thisptr.getArea()
    def move(self, dx, dy):
        self.thisptr.move(dx, dy)

---

非常感谢，斯文策尔！现在，它起作用了

rect.pyx

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

cdef extern from "Rectangle.h" namespace "shapes":
cdef cppclass Rectangle:
Rectangle(int, int, int, int) except +
int x0, y0, x1, y1
int getLength() const
int getHeight() const
int getArea() const
void move(int, int)

cdef class PyRectangle:
cdef Rectangle *thisptr
def __cinit__(self, int x0, int y0, int x1, int y1):
self.thisptr = new Rectangle(x0, y0, x1, y1)
def __dealloc__(self):
del self.thisptr
def getLength(self):
return self.thisptr.getLength()
def getHeight(self):
return self.thisptr.getHeight()
def getArea(self):
return self.thisptr.getArea()
def move(self, dx, dy):
self.thisptr.move(dx, dy)

# distutils: language = c++
# distutils: sources = Rectangle.cpp
cdef extern from "Rectangle.h" namespace "shapes":
    cdef cppclass Rectangle:
        Rectangle(int, int, int, int) except +
        int x0, y0, x1, y1
        int getLength()
        int getHeight()  
        int getArea()  
        void move(int, int)

cdef class PyRectangle:
    cdef Rectangle *thisptr
    def __cinit__(self, int x0, int y0, int x1, int y1):
        self.thisptr = new Rectangle(x0, y0, x1, y1)
    def __dealloc__(self):
        del self.thisptr
    def getLength(self):
        return self.thisptr.getLength()
    def getHeight(self):
        return self.thisptr.getHeight()
    def getArea(self):
        return self.thisptr.getArea()
    def move(self, dx, dy):
        self.thisptr.move(dx, dy)

您知道python使用缩进而不是大括号来形成块吗？再次阅读错误消息，然后查看

rect.pyx

。。。不知怎的，当从网站复制时，你丢失了所有的缩进空间。你知道python使用缩进而不是大括号来形成块吗？再次阅读错误消息，然后查看

rect.pyx

。。。不知何故，从网站复制时，您丢失了所有缩进空间。