1
我已经使用CDEF定义Python类它包装与用Cython C++类和它工作正常。但是,当我在Python或类中使用帮助(类)?在IPython中我得到类似如下:用Cython CDEF类未显示文档字符串或__init__参数
>>> TestClass.CTestClass?
Init signature: TestClass.CTestClass()
Docstring: <no docstring>
File: ~/Coding/CythonWithCppTutorials/ClassCythonCPPWithMemberFunctions/TestClass.so
Type: type
它不显示任何文档字符串或init签名,我想有显示的,我怎么能拿它来显示这个?
的用Cython包装如下:
TestClass.pyx
import cython
import numpy as np
cimport numpy as np
cdef extern from "TestClassC.cpp": # defines the source C++ file
cdef cppclass TestClass: # says that there is a class defined in the above C++ file called TestClass
TestClass(int Dimensionality, double* InputArray) # the class has public member function TestClass which takes some arguments
double SumListOfNumbers() # the class has a public member function which returns a double and has no arguments
int Dimensionality # the class has a public variable that is an integer and is called Dimensionality
double* ListOfNumbers # the class has another public variable that is a pointer to a double
cdef class CTestClass: # defines a python wrapper to the C++ class
"""
This is a test class wrapper for c++.
"""
cdef TestClass* thisptr # thisptr is a pointer that will hold to the instance of the C++ class
def __cinit__(self, int Dimensionality, np.ndarray[double, ndim=1, mode="c"] InputArray not None): # defines the python wrapper class' init function
cdef double[::1] InputArrayC = InputArray # defines a memoryview containnig a 1D numpy array - this can be passed as a C-like array by providing a pointer to the 1st element and the length
self.thisptr = new TestClass(Dimensionality, &InputArrayC[0]) # creates an instance of the C++ class and puts allocates the pointer to this
def __dealloc__(self): # defines the python wrapper class' deallocation function (python destructor)
del self.thisptr # destroys the reference to the C++ instance (which calls the C++ class destructor
def CSumListOfNumbers(self):
return self.thisptr.SumListOfNumbers()
和C++代码看起来像这样:
TestClassC.cpp
#include <iostream>
class TestClass{
public:
TestClass(int Dimensionality, double* InputArray); // prototype of constructor
~TestClass(void); // prototype of destructor
double SumListOfNumbers(void);
int Dimensionality;
double* ListOfNumbers;
};
TestClass::TestClass(int DIM, double* InputArray)
{
Dimensionality = DIM;
std::cout << Dimensionality << "\n";
ListOfNumbers = new double[Dimensionality];
for (int i = 0; i < Dimensionality; ++i) {
ListOfNumbers[i] = InputArray[i];
std::cout << ListOfNumbers[i] << ", ";
}
std::cout << "\n";
};
TestClass::~TestClass(void){
std::cout << "Being Destroyed" << "\n";
};
double TestClass::SumListOfNumbers(void){
double Sum = 0;
for (int i = 0; i < Dimensionality; ++i) {
Sum += ListOfNumbers[i];
}
return Sum;
}
将用Cython编译器指令'embedsignature'来'真'。请参阅[DOC](http://docs.cython.org/en/latest/src/reference/compilation.html#compiler-directives) – oz1
@SomeRandomPhysicist在一个更切下来测试用例与用Cython 0.25.2它适用于我。我知道这对你没什么帮助 – DavidW
将编译器指令embedignature设置为true对于docstring有效,但它不设置Init签名。 – SomeRandomPhysicist