Question

我用C ++创建了2个模块，并通过Cython将它们导入Python。第一个模块叫做Generator，它包含两个类：MersenneTwister，它实现了生成伪随机数的算法，以及一个生成MersenneTwister对象的Generator类。第二个模块称为KMeans，包含一个函数调用KMeans，实现用于聚类数据的K-Means算法。对于这两个模块，我创建了相应的.pyx文件，通过cython编译好，然后使用g ++我创建了.so文件然后在python中导入了KMeans.so文件，接收：ImportError：./ KMeans.so ：未定义的符号：_ZN9Generator8instanceEv

我使用以下命令编译.cpp文件：g ++ -shared -pthread -fPIC -fwrapv -fno-strict-aliasing -o file.so file.cpp

# KMeans.pyx files 

include "Generator.pyx"
from libcpp.vector cimport vector
cdef import from "KMeans.h" :

           cdef struct Pair:

               vector[vector[double]] C
               vector[unsigned int] J

               Pair(vector[vector[double]] _C, vector[unsigned int] _J)

           cdef double s(vector[double] X, vector[double] c)
           cdef void   AddToCodeword(vector[double] X, vector[double] c)
           cdef Pair KMeans(unsigned int k, vector[vector[double]] X) except +

def KMean(unsigned k, X):

   cdef Pair returnValue = KMeans(k, X)

   return returnValue.C, returnValue.J

#Generator.pyx file


cdef extern from "mt.h":

    cppclass MersenneTwister:

       MersenneTwister()

       #public members
       double random() 
       void init_genrand(unsigned long s)
       void init_by_array(unsigned long* init_key, int key_length)
       unsigned long genrand_int32()
       long genrand_int31()
       double genrand_real1()
       double genrand_real2()
       double genrand_real3()
       double genrand_res53()

       #private members
       unsigned long* mt_
       int mti_
       unsigned long* init_key_
       int key_length_ 
       unsigned long s_
       int seeded_by_array_ 
       int seeded_by_int_

#static members
cdef extern from "mt.h" namespace "MersenneTwister":

       int N                    = 624
       int M                    = 397
       unsigned long MATRIX_A   = 0x9908b0dfUL
       unsigned long UPPER_MASK = 0x80000000UL
       unsigned long LOWER_MASK = 0x7fffffffUL

cdef extern from "generator.h" namespace "Generator":

    MersenneTwister *_ptr_
    MersenneTwister *instance()
    MersenneTwister *instance(unsigned int seed)

Python ImportError：无法找到符号 - 用于自定义C ++模块

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