Add boto3 dependency, add venv/.venv to .gitignore

[TimothyWillard]

Should address #238.

[jcblemai]

Thanks, Tim, very good catch. Few thoughts:

This originates from #218 which makes me wonder if we should add botocores as well or if it is included in boto.

I'm also hesitant to force the user to install boto3 (which is not that easy in some conda environments) just for some batch functions that are not often used. Most of our users won't have an AWS CLI set up.

Perhaps we should import boto just in the aws batch functions that need it (like it's done in batch/inference_job: you can run it locally without a CLI, only with the --aws flag it imports the modules). We can also add it to an extra install target (batch, aws?)? I'm hesitant about the last item because it is also complex to have several targets.

[emprzy]

Don't have much/any input, but thank you for looping me in! Good for my edification to see stuff like this!

[TimothyWillard]

This originates from #218 which makes me wonder if we should add botocores as well or if it is included in boto.

boto3 is tightly coupled to botocore, but I went ahead and added it as an install dependency anyways since we explicitly import from botocore.

I'm also hesitant to force the user to install boto3 (which is not that easy in some conda environments) just for some batch functions that are not often used. Most of our users won't have an AWS CLI set up.

I went ahead and made it an optional install target, my main concern is being able to successfully install and run the package following the quick start documentation and these dependencies are used in only one function. So if making this a required dependency for the package causes more headaches let's just go with the path of least resistance.

[jcblemai]

Thanks, that looks good to me. It's a bit unfortunate that the python setup tools do not support "negative" targets (e.g. a pip install gempyor with everything, and a pip install gemypor[light] with a stripped down version). But it has been requested for a long time.

PR all good to merge, ty Tim

[TimothyWillard]

Thanks for reviewing y'all! Merging this one in, I'm quite excited to clean up my git status.