Boto3 with IAM roles

minimal_s3_example.py

#!/usr/bin/env python3
import boto3
sts = bot3.client('sts')
role = sts.assume_role(
	RoleArn="arn:aws:iam::ACCOUNT NUMBER:role/ROLENAME",
	RoleSessionName="AssumeRoleSession1"
)

credentials = assumed_role_object['Credentials']

s3 = boto3.resource(
	's3',
	aws_access_key_id=credentials['AccessKeyId'],
	aws_secret_access_key=credentials['SecretAccessKey'],
	aws_session_token=credentials['SessionToken'],
)

for bucket in s3_resource.buckets.all():
    print(bucket.name)
    
# use S3 appropriately from here