[boto] force multipart ETag to match MD5 hash by copying it to a new file

boto-multipart-etag.py

from boto.s3.connection import S3Connection

# initiate the connection
conn = S3Connection(ACCESSKEY, SECRETKEY)
b = conn.get_bucket(BUCKET)

# Create a new multipart object out of 2 parts
mp = b.initiate_multipart_upload('joinedfile')
mp.copy_part_from_key(b.name, 'part1', 1)
mp.copy_part_from_key(b.name, 'part2', 2)
mp.complete_upload()

# Rename (copy & delete) the file to recalculate ETag correctly
k = b.get_key('joinedfile')
k.copy(b, 'newfile')
k.delete()

# Get the newfile ETag
k = b.get_key('newfile')
print k.etag