def s3_upload(s3,data,target,out_index_num,norr, extension=".index"):
    keyname = '/'.join([target['prefix'],target['key']+'.'+str(out_index_num)+extension])
    s3uri = 's3://'+target['bucket']+'/'+keyname
    data.seek(0)
    extra_args = {'StorageClass':'REDUCED_REDUNDANCY'}
    if norr:
        extra_args = {}
    try:
        # HeadObject to see if exist (needs ListBucket or this returns 403)
        s3.Object(target['bucket'], keyname).load()
        logger.info("{} exist. Skipping...".format(s3uri))
    except ClientError as ce: # if does not exist, then upload
        if ce.response["Error"]["Code"] == "404":
            try:
                s3.Bucket(target['bucket']).upload_fileobj(data,keyname,ExtraArgs=extra_args)
            except ClientError as e:
                logger.error('Unable to upload to {}'.format(s3uri))
                logger.debug('Received error: {}'.format(e))
                sys.exit(4)
            logger.info("Uploaded to {}".format(s3uri))
        elif ce.response["Error"]["Code"] == "403":
            logger.error('Permission error loading {}\n Please check your IAM policy.'.format(s3uri))
            logger.debug('Received error: {}'.format(ce))
            sys.exit(7)
        else:
            logger.error('Unknown error loading {}'.format(s3uri))
            logger.debug('Received error: {}'.format(ce))
            sys.exit(7)
    return