__init__() 应该为使用 boost_python 的 python 模块返回 None，而不是 'NoneType'

如何解决__init__() 应该为使用 boost_python 的 python 模块返回 None，而不是 'NoneType'

我使用的是python3和我自己编译的[Renderman][1]。

这个库使用了 boost_python，它通过 cpp 制作了 python 库。

test.py

import librenderman as rm     
engine = rm.RenderEngine(44100,512,512)

我有这样的错误

$python test.py
JUCE v5.2.0
Traceback (most recent call last):
  File "test.py",line 3,in <module>
    engine = rm.RenderEngine(44100,512)
TypeError: __init__() should return None,not 'nonetype'

我搜索了一下，发现这是因为 python 2/3 差异。

然后检查链接库

$otool -L librenderman.so 
librenderman.so:
    /usr/local/lib/librenderman.so.dylib (compatibility version 1.0.0,current version 1.0.0)
    @rpath/libpython3.7m.dylib (compatibility version 3.7.0,current version 3.7.0)
    @rpath/libboost_python37.dylib (compatibility version 0.0.0,current version 0.0.0)
    /System/Library/Frameworks/AudioUnit.framework/Versions/A/AudioUnit (compatibility version 1.0.0,current version 1.0.0)
    /System/Library/Frameworks/Accelerate.framework/Versions/A/Accelerate (compatibility version 1.0.0,current version 4.0.0)
    /System/Library/Frameworks/AudioToolBox.framework/Versions/A/AudioToolBox (compatibility version 1.0.0,current version 1000.0.0)
    /System/Library/Frameworks/AVFoundation.framework/Versions/A/AVFoundation (compatibility version 1.0.0,current version 2.0.0)
    /System/Library/Frameworks/AVKit.framework/Versions/A/AVKit (compatibility version 1.0.0,current version 1.0.0)
    /System/Library/Frameworks/Carbon.framework/Versions/A/Carbon (compatibility version 2.0.0,current version 164.0.0)
    /System/Library/Frameworks/Cocoa.framework/Versions/A/Cocoa (compatibility version 1.0.0,current version 23.0.0)
    /System/Library/Frameworks/CoreAudio.framework/Versions/A/CoreAudio (compatibility version 1.0.0,current version 1.0.0)
    /System/Library/Frameworks/CoreAudioKit.framework/Versions/A/CoreAudioKit (compatibility version 1.0.0,current version 1.0.0)
    /System/Library/Frameworks/CoreMedia.framework/Versions/A/CoreMedia (compatibility version 1.0.0,current version 1.0.0)
    /System/Library/Frameworks/CoreMIDI.framework/Versions/A/CoreMIDI (compatibility version 1.0.0,current version 69.0.0)
    /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit (compatibility version 1.0.0,current version 275.0.0)
    /System/Library/Frameworks/OpenGL.framework/Versions/A/OpenGL (compatibility version 1.0.0,current version 1.0.0)
    /System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore (compatibility version 1.2.0,current version 1.11.0)
    /System/Library/Frameworks/WebKit.framework/Versions/A/WebKit (compatibility version 1.0.0,current version 610.3.7)
    @rpath/libc++.1.dylib (compatibility version 1.0.0,current version 1.0.0)
    /usr/lib/libSystem.B.dylib (compatibility version 1.0.0,current version 1292.60.1)
    /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit (compatibility version 45.0.0,current version 2022.20.117)
    /System/Library/Frameworks/applicationservices.framework/Versions/A/applicationservices (compatibility version 1.0.0,current version 54.0.0)
    /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0,current version 1770.255.0)
    /System/Library/Frameworks/CoreGraphics.framework/Versions/A/CoreGraphics (compatibility version 64.0.0,current version 1463.2.1)
    /System/Library/Frameworks/CoreServices.framework/Versions/A/CoreServices (compatibility version 1.0.0,current version 1122.11.0)
    /System/Library/Frameworks/CoreText.framework/Versions/A/CoreText (compatibility version 1.0.0,current version 1.0.0)
    /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation (compatibility version 300.0.0,current version 1770.255.0)
    /System/Library/Frameworks/ImageIO.framework/Versions/A/ImageIO (compatibility version 1.0.0,current version 1.0.0)
    /usr/lib/libobjc.A.dylib (compatibility version 1.0.0,current version 228.0.0)

我认为 python3 模块链接正确。

我应该在哪里以及如何解决这个问题？？

虽然我熟悉python3，但不熟悉python2和boost-python

任何建议都有帮助。

RenderEngine.h

/*
  ==============================================================================

    RenderEngine.h
    Created: 19 Feb 2017 9:47:15pm
    Author:  tollie

  ==============================================================================
*/

#ifndef RENDERENGINE_H_INCLUDED
#define RENDERENGINE_H_INCLUDED

#include <random>
#include <array>
#include <iomanip>
#include <sstream>
#include <string>
#include "Maximilian/maximilian.h"
#include "Maximilian/libs/maxiFFT.h"
#include "Maximilian/libs/maxiMFCC.h"
#include "../JuceLibraryCode/JuceHeader.h"

using namespace juce;

typedef std::vector<std::pair<int,float>>  PluginPatch;
typedef std::vector<std::array<double,13>> MFCCFeatures;

class RenderEngine
{
public:
    RenderEngine (int sr,int bs,int ffts) :
        sampleRate(sr),bufferSize(bs),fftSize(ffts),plugin(nullptr)
    {
        maxiSettings::setup (sampleRate,1,bufferSize);
    }

    virtual ~RenderEngine()
    {
        if (plugin != nullptr)
        {
            plugin->releaseResources();
            delete plugin;
        }
    }


    bool loadplugin (const std::string& path);

    void setPatch (const PluginPatch patch);

    const PluginPatch getPatch();

    void renderPatch (const uint8  midiNote,const uint8  midiveLocity,const double noteLength,const double renderLength);

    const MFCCFeatures getMFCCFrames();

    const MFCCFeatures getnormalisedMFCCFrames (const std::array<double,13>& mean,const std::array<double,13>& variance);

    const std::vector<double> getRMSFrames();

    const size_t getPluginParameterSize();

    const String getPluginParametersDescription();

    bool overridePluginParameter (const int   index,const float value);

    bool removeOverridenParameter (const int index);

    const std::vector<double> getAudioFrames();

    bool writetoWav(const std::string& path);

private:
    void fillAudioFeatures (const AudioSampleBuffer& data,maxiFFT&                 fft);

    void ifTimeSetNoteOff (const double& noteLength,const double& sampleRate,const int&    bufferSize,const uint8&  midiChannel,const uint8&  midiPitch,const uint8&  midiveLocity,const int&    currentBufferIndex,MidiBuffer&   bufferToNoteOff);

    void fillAvailablePluginParameters (PluginPatch& params);

    double               sampleRate;
    int                  bufferSize;
    int                  fftSize;
    maxiMFCC             mfcc;
    AudioPluginInstance* plugin;
    PluginPatch          pluginParameters;
    PluginPatch          overridenParameters;
    MFCCFeatures         mfccFeatures;
    std::vector<double>  processedMonoAudioPreview;
    std::vector<double>  rmsFrames;
    double               currentRmsFrame;
};


#endif  // RENDERENGINE_H_INCLUDED