Use boto to create an RRS Key in S3

create_rrs_key.py

# Create a new key in an S3 bucket and specify you want to use
# the Reduced Redundancy Storage (RRS) option of S3 
import boto

# create connection to S3 service
s3 = boto.connect_s3()

# lookup my existing bucket
bucket = s3.lookup('mybucket')

# create a new, empty Key object in that bucket
key = bucket.new_key('rrskey')

# store the content of the key and specify you want to use RRS
key.set_contents_from_filename('/home/mitch/mylocalfile.txt', reduced_redundancy=True)