AttributeError: module 'tutorial' has no attribute 'my_qpsk_demod_cb' given by Gnuradio Companion

Question

我还有一个问题。我一直在关注创建 QPSK 解调器的教程。这是 link：https://wiki.gnuradio.org/index.php/Guided_Tutorial_GNU_Radio_in_C%2B%2B 我能够解决一个不同的问题并修复了我收到的警告，但是出现了一个新问题，我似乎无法解决它。这是错误：

Traceback (most recent call last):
File "/home/mariom/gr-tutorial/build/top_block.py", line 191, in <module> 
 main()
File "/home/mariom/gr-tutorial/build/top_block.py", line 167, in main 
 tb = top_block_cls()
File "/home/mariom/gr-tutorial/build/top_block.py", line 82, in __init__
 self.tutorial_my_qpsk_demod_cb_0 = tutorial.my_qpsk_demod_cb(True)
AttributeError: module 'tutorial' has no attribute 'my_qpsk_demod_cb'

Noramlly 当我看到这个错误时，我想我知道如何解决这个问题并找到模块教程并添加 my_qpsk_demod_cb。这一次，我似乎运行陷入了我似乎无法找到正确区域或者我在正确区域中的问题。我知道问题出在我从教程中创建的块中，所以有什么想法吗？这是块代码。

My_qpsk_demod_cb_impl.cc

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <gnuradio/io_signature.h>
#include "my_qpsk_demod_cb_impl.h"

namespace gr {
 namespace tutorial {

   my_qpsk_demod_cb::sptr
   my_qpsk_demod_cb::make(bool gray_code)
  {
    return gnuradio::get_initial_sptr
      (new my_qpsk_demod_cb_impl(gray_code));
  }

  /*
   * The private constructor
   */
  my_qpsk_demod_cb_impl::my_qpsk_demod_cb_impl(bool gray_code)
    : gr::block("my_qpsk_demod_cb",
            gr::io_signature::make(1, 1, sizeof(gr_complex)),
            gr::io_signature::make(1, 1, sizeof(char))),
      d_gray_code(gray_code)
  {
  }

  /*
   * Our virtual destructor.
   */
  my_qpsk_demod_cb_impl::~my_qpsk_demod_cb_impl()
  {
  }

  void
  my_qpsk_demod_cb_impl::forecast(int noutput_items,
                   gr_vector_int &ninput_items_required)
  {
  unsigned ninputs = ninput_items_required.size ();
  for(unsigned i = 0; i < ninputs; i++)
    ninput_items_required[i] = noutput_items;
  }

  unsigned char
  my_qpsk_demod_cb_impl::get_minimum_distances(const gr_complex &sample)
  {
    if (d_gray_code) {
      unsigned char bit0 = 0;
      unsigned char bit1 = 0;
      // The two left quadrants (quadrature component < 0) have this bit set to 1
      if (sample.real() < 0) {
        bit0 = 0x01;
      }
      // The two lower quadrants (in-phase component < 0) have this bit set to 1
      if (sample.imag() < 0) {
        bit1 = 0x01 << 1;
      }
      return bit0 | bit1;
      } else {
      // For non-gray code, we can't simply decide on signs, so we check every single 
    quadrant.
     if (sample.imag() >= 0 and sample.real() >= 0) {
        return 0x00;
     }
     else if (sample.imag() >= 0 and sample.real() < 0) {
       return 0x01;
     }
     else if (sample.imag() < 0 and sample.real() < 0) {
      return 0x02;
     }
     else if (sample.imag() < 0 and sample.real() >= 0) {
      return 0x03;
     }
   }
   return 0;
 }

 int
 my_qpsk_demod_cb_impl::general_work (int noutput_items,
                    gr_vector_int &ninput_items,
                    gr_vector_const_void_star &input_items,
                    gr_vector_void_star &output_items)
 {
     const gr_complex *in = (const gr_complex *) input_items[0];
        unsigned char *out = (unsigned char *) output_items[0];
        gr_complex origin = gr_complex(0,0);
        // Perform ML decoding over the input iq data to generate alphabets
        for(int i = 0; i < noutput_items; i++)
        {
                // ML decoder, determine the minimum distance from all constellation points
                out[i] = get_minimum_distances(in[i]);
        }
        // Tell runtime system how many input items we consumed on
        // each input stream.
        consume_each (noutput_items);
        // Tell runtime system how many output items we produced.
        return noutput_items;
    }
  } /* namespace tutorial */
} /* namespace gr */

my_qpsk_demod_cb_impl.h

#ifndef INCLUDED_TUTORIAL_MY_QPSK_DEMOD_CB_IMPL_H
#define INCLUDED_TUTORIAL_MY_QPSK_DEMOD_CB_IMPL_H

#include <tutorial/my_qpsk_demod_cb.h>

namespace gr {
  namespace tutorial {

    class my_qpsk_demod_cb_impl : public my_qpsk_demod_cb
    {
    private:
      bool d_gray_code;

    public:
      my_qpsk_demod_cb_impl(bool gray_code);
      ~my_qpsk_demod_cb_impl();
      unsigned char get_minimum_distances(const gr_complex &sample);

      // Where all the action really happens
      void forecast (int noutput_items, gr_vector_int &ninput_items_required);

      int general_work(int noutput_items,
           gr_vector_int &ninput_items,
           gr_vector_const_void_star &input_items,
           gr_vector_void_star &output_items);
    };

  } // namespace tutorial
} // namespace gr

#endif /* INCLUDED_TUTORIAL_MY_QPSK_DEMOD_CB_IMPL_H */

Answer 1

我认为您缺少 swig/dependencies 或 PYTHONPATH。我有同样的问题，并且能够通过以下修复解决它：

安装特定于您的环境的依赖项（包括swig）：https://wiki.gnuradio.org/index.php/UbuntuInstall#Bionic_Beaver_.2818.04.29_through_Eoan_Ermine_.2819.10.29
根据以下步骤配置 PYTHONPATH and/or LD_LIBRARY_PATH：https://wiki.gnuradio.org/index.php/ModuleNotFoundError

（请注意，根据这种情况，顺序可能很重要：https://lists.gnu.org/archive/html/discuss-gnuradio/2016-03/msg00065.html）

AttributeError: module 'tutorial' has no attribute 'my_qpsk_demod_cb' given by Gnuradio Companion

AttributeError: module 'tutorial' has no attribute 'my_qpsk_demod_cb' given by Gnuradio Companion

python

c++

python-3.x

gnuradio

gnuradio-companion