(aws-cdk): python installation is not working when following getting started

What is the problem?

When following the python getting started guide, the deployment will fail after any aws-cdk dependency installation

Reproduction Steps

Follow the getting started steps. mkdir my-project && cd my-project && cdk init app --language python Activate the environment: source .venv/bin/activate Install dependencies: python -m pip install -r requirements.txt Then, cdk deploy will work. Now install a dependency, like: python -m pip install aws-cdk.aws-s3 Now cdk deploy will fail with error: AttributeError: partially initialized module 'aws_cdk' has no attribute 'cx_api' (most likely due to a circular import)

What did you expect to happen?

The deployment should work

What actually happened?

cdk deploy fails with error: AttributeError: partially initialized module 'aws_cdk' has no attribute 'cx_api' (most likely due to a circular import)

CDK CLI Version

2.2.0

Framework Version

2.2.0

Node.js Version

14.17.4

OS

Ubuntu 20.04.1 LTS

Language

Python

Language Version

3.9.5

Other information

We can observe an error at aws-cdk-lib dependencies resolution at pip install: ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts. aws-cdk-lib 2.2.0 requires constructs<11.0.0,>=10.0.0, but you have constructs 3.3.167 which is incompatible.

[loicmarie]

Yes @peterwoodworth I fixed it by finding the v2 doc. So this can be closed I think. But still, I find it surprising that the getting started guide, that is the first entrypoint for cdk python beginners, is not working when following it step by step.

[loicmarie]

Ok I just realised aws_s3 has been moved into aws_cdk in 2.0. So no need to pip install aws-cdk.aws-s3 anymore, just from aws_cdk import aws_s3 as s3. Don’t know if it is the case for all cdk packages though.

So in my case, aws-cdk-lib was in 2.2.0, and aws-s3 was in 1.136.0, resulting in the above mentioned error. I think this is an important information that is not in the doc, but I can be wrong