Prunes folder (all object versions and delete markers) on S3

s3prune.py

#!/usr/bin/env python
# Prunes folder (all object versions and delete markers) on S3
import boto3
import sys

if len(sys.argv) != 3:
    print('usage: {} <bucket> <prefix>'.format(sys.argv[0]))
    sys.exit(1)

if sys.argv[2] == '/':
    print('Prefix / not supported by policy')
    sys.exit(1)

client = boto3.client('s3')
bucket = sys.argv[1]
prefix = sys.argv[2]
hasMore = True
keyMarker = None
while hasMore:
    if keyMarker:
        object_list = client.list_object_versions(Bucket=bucket,
            MaxKeys=1000, Prefix=prefix, KeyMarker=keyMarker)
    else:
        object_list = client.list_object_versions(Bucket=bucket,
            MaxKeys=1000, Prefix=prefix)
    if 'Versions' in object_list:
        objects = []
        entries = object_list['Versions']
        for e in entries:
            print('Deleting: ' + e['Key'])
            objects.append({'VersionId': e['VersionId'], 'Key': e['Key']})
        client.delete_objects(Bucket=bucket, Delete={'Objects': objects})
    if 'DeleteMarkers' in object_list:
        objects = []
        entries = object_list['DeleteMarkers']
        for e in entries:
            print('Deleting: ' + e['Key'])
            objects.append({'VersionId': e['VersionId'], 'Key': e['Key']})
        client.delete_objects(Bucket=bucket, Delete={'Objects': objects})
    hasMore = object_list['IsTruncated']
    keyMarker = object_list['KeyMarker']