Does boto3 have a credential cache comparable to awscli?

Question

With awscli there's a credential cache in ~/.aws/cli/cache which allows me to cache credentials for a while. This is very helpful when using MFA. Does boto3 have a similar capability or do I have to explicitly cache my credentials returned from session = boto3.session.Session(profile_name='CTO:Admin')?

Answer 1

Originally, the credential caching and automatic renewing of temporary credentials was part of the AWSCLI but this commit (and some subsequent ones) moved that functionality to botocore which means it is now available in boto3, as well.

Answer 2

I created a Python library that provides this for you - see https://github.com/mixja/boto3-session-cache

Example:

import boto3_session_cache

# This returns a regular boto3 client object with the underlying session configured with local credential cache 
client = boto3_session_cache.client('ecs')
ecs_clusters = client.list_clusters()