Python + Couchbase + Docker basic example not working

Python SDK
1

Dockerfile:

FROM python:3.6
RUN apt-get update && apt-get install -y git-all python3-dev python3-pip python3-setuptools cmake build-essential libssl-dev
RUN pip install couchbase==3.1.1
COPY app.py app.py
CMD python app.py

Python’s app.py file

from couchbase.management.queries import QueryIndexManager

if __name__ == "__main__":
	print("Start")

Run command: docker build . -t couchbase_issue && docker run couchbase_issue

Error log:

Traceback (most recent call last):
  File "app.py", line 1, in <module>
    from couchbase.management.queries import QueryIndexManager
  File "/usr/local/lib/python3.6/site-packages/couchbase/management/queries.py", line 8, in <module>
    from couchbase_core._pyport import Protocol
ImportError: cannot import name 'Protocol'
2

Protocol is introduced in python 3.8 and your basic app is using 3.6. I have tested your example with 3.8, it’s printing the Start log.

3

I am using another library that has dependency on Python 3.6. Is there no way of making this work in 3.6?

4

Try with Couchbase SDK version that is compatible with python 3.6.

5

Porting to 3.8 worked, but I really hope that there is a better solution that can work with 3.6. Various ML/AI related libraries have either not ported to 3.8 completely, or broken backwards compatibility in doing so.

6

Hi @Gautam_Singhania – can you bash into the Docker container and do the following:

python -m pip uninstall typing-extensions
python -m pip install typing-extensions==3.7.4.3

You should also be able to add RUN commands to your dockerfile.
The typing-extensions package made an update over the week which is causing this ImportError. This should be corrected in the 3.1.2 SDK release (happening soon).