无法从“google.protobuf.internal”导入名称“builder”

Question

我用 Python 编写了一个使用

Object Detection API

的程序。我尝试在命令提示符下运行我的代码：

python object_detection/builders/model_builder_test.py

但是，我得到以下错误：

Traceback (most recent call last):
  File "C:\Users\aurel\ggggggggatau\models\research\object_detection\builders\model_builder_test.py", line 20, in <module>
    from object_detection.builders import model_builder
  File "C:\Users\aurel\AppData\Local\Programs\Python\Python39\lib\site-packages\object_detection\builders\model_builder.py", line 23, in <module>
    from object_detection.builders import anchor_generator_builder
  File "C:\Users\aurel\AppData\Local\Programs\Python\Python39\lib\site-packages\object_detection\builders\anchor_generator_builder.py", line 26, in <module>
    from object_detection.protos import anchor_generator_pb2
  File "C:\Users\aurel\AppData\Local\Programs\Python\Python39\lib\site-packages\object_detection\protos\anchor_generator_pb2.py", line 5, in <module>
    from google.protobuf.internal import builder as _builder
ImportError: cannot import name 'builder' from 'google.protobuf.internal' (C:\Users\aurel\AppData\Local\Programs\Python\Python39\lib\site-packages\google\protobuf\internal\__init__.py)

我已完成以下步骤：

1. 安装最新的protobuf版本

   pip install --upgrade protobuf

   .
2. 将

   builder.py

   从

   /Lib/site-packages/google/protobuf/internal

   复制到另一个文件夹。
3. 安装与我的项目兼容的 protobuf 版本 (3.19.4)

   pip install protobuf==3.19.4

   .
4. 将

   builder.py

   从另一个文件夹复制到

   Lib/site-packages/google/protobuf/internal

   .
5. 运行代码。

但是，我仍然遇到同样的错误。