retrive all versions of bucket

python

import sys
import boto3
from datetime import datetime, timezone

Bucket = 'BUCKET_NAME'
client = boto3.client('s3')

#prefix = sys.argv[1] + "/"
Prefix = ""

now = datetime.now(timezone.utc)
total_size = 0
daily_size = {7: 0, 15: 0, 30: 0}
MaxKeys = 1000
KeyMarker = None

IsTruncated = True

size_map = {7: 0, 15: 0, 30: 0, 3650: 0}

while IsTruncated == True:
    if not KeyMarker:
        version_list = client.list_object_versions(
            Bucket=Bucket,
            MaxKeys=MaxKeys,
            Prefix=Prefix)
    else:
        version_list = client.list_object_versions(
            Bucket=Bucket,
            MaxKeys=MaxKeys,
            Prefix=Prefix,
            KeyMarker=KeyMarker)

    try:
        objects = []
        versions = version_list['Versions']
        for v in versions:
            isLatest = v['IsLatest']
            size = v['Size']
            total_size += size
            if not isLatest:
                mdate = v['LastModified']
                dtime = now - mdate
                day, _ = divmod(dtime.total_seconds(), 86400)
                day = int(day)
                for key in size_map.keys():
                    if day < key:
                        size_map[key] += size
    
        IsTruncated = version_list['IsTruncated']
        KeyMarker = version_list['NextKeyMarker']
    except:
        IsTruncated = False


print("total size: ", total_size/1024/1024/1024/1024)
print("cost: ", total_size/1024/1024/1024/1024*1000*0.023)

for key in size_map.keys():
    print(key, " days")
    v = size_map[key]
    print("size: ", v/1024/1024/1024/1024)
    print("cost: ", v/1024/1024/1024/1024*1000*0.023)