Is there any can help resolve this issue https://github.com/protocolbuffers/protobuf/issues/8259

[Tina Bao]

I reported the issue in https://github.com/protocolbuffers/protobuf/issues/8259 

As it really impact my work. So I repeated it here. 

I know it is an old issue and have been duplicated with the others . But I have searched related issue and tried everything I can do .
I have been trapped with this issue for 2 days. Please kindly help.

What version of protobuf and what language are you using?
Version: 3.14.0

Language: Python 3.6.9

What operating system (Linux, Windows, ...) and version?

1. execution in Python env in Mac os 11.0.1 works fine
2. executed in Unbuntu 18.04 will reported this error TypeError: Descriptors should not be created directly, but only retrieved from their parent" message

What runtime / compiler are you using (e.g., python version or gcc version)
Language: Python 3.6.9

What did you do?
Steps to reproduce the behavior:

1. set up a test.proto file
2. use command to compile it into py file : protoc ./test.proto --python_out=./ , then come out test_pb2.py file
3. include tesy_pb2 in other code
4. python run the other code
5. execution in Python env in Mac os 11.0.1 works fine
   executed in Unbuntu 18.04 will reported this error TypeError: Descriptors should not be created directly, but only retrieved from their parent" message
   from test import (
   File "/home/jenkins/agent/workspace/QAE/test_pb2.py", line 38, in
   create_key=_descriptor._internal_create_key),
   File "/usr/local/lib/python3.6/dist-packages/google/protobuf/descriptor.py", line 718, in new
   _message.Message._CheckCalledFromGeneratedFile()
   TypeError: Descriptors should not be created directly, but only retrieved from their parent.

What did you expect to see
Please kindly tell me how to resolve this issue . Please please help . It really block my work and the progress of my project .