Installing SDK without botocore and other transitive dependencies about aws-xray-sdk-python HOT 4 OPEN

Hi @corey-cole - thanks for the request and for raising the Lambda powertools as an option. We are open to a PR for this enhancement, otherwise it will be on our backlog for now.

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I see now that there's a issue listing big changes to v3, so if there's no option other than to a breaking change, I think we might as well add this in v3.

#261

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Incremental suggestion: The AWS Lambda Powertools are packaged such that it excludes boto3 etc, but users can include the SDK if desired (i.e. for local testing). https://github.com/awslabs/aws-lambda-powertools-python/releases/tag/v2.0.0

For example, installing locally and letting pip pick out the associated version of boto3 is managed via pip install aws-lambda-powertools[aws-sdk]

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Hi XRay team! I was wondering here if I could work on this and submit a PR. This is actually a huge improvement for anyone using the Lambda Runtime or even another container that comes with botocore as we can take ~77MB out of the deployment package.

I've been using the XRAY SDK for Python for a long time, but this is the first time I've seen the build package and tests. I see that in install_requires you always include botocore, and I don't think we can create a tiny package without a potential breaking change for the non-Lambda runtime, which brings botocore by default. We can remove botocore and add extras_require as an optional dependency, but this will be a potential breaking change for those who just type pip install aws-xray-sdk.
I thought we could create an extras_require that would install something by default, but it looks like setuptools doesn't support that - pypa/setuptools#1139.

Do you know if there is another alternative to solve this? It might be interesting if we can find a solution to do this without a breaking change.

Thank you

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