S3 get all objects versions

get-s3-versions.py

#!/usr/bin/env python3
import os
import boto3
import argparse

parser = argparse.ArgumentParser(
    description="copy all versions of objects into separate files"
)
parser.add_argument("--bucket", "-b", required=True)
parser.add_argument("--profile", "-p")
parser.add_argument("--dest", "-d", default=".")
parser.add_argument(
    "objects", nargs="*", default=[], help="objects to get all versions"
)
args = parse.parse_args()


if "AWS_PROFILE" not in os.environ:
    os.environ["AWS_PROFILE"] = args.profile

s3api = boto3.client("s3")


for obj in args.objects:
    paginator = s3api.get_paginator("list_object_versions")
    versions = []
    dest_dir = os.path.join(args.dest, obj)
    for list_res in paginator.paginate(Bucket=args.bucket, Prefix=obj):
        versions += [v for v in list_res["Versions"] if v["Key"] == obj]

    for v in versions:
        os.makedirs(dest_dir, exist_ok=True)
        get_res = None
        try:
            print(f"Getting key={obj}, version={str(v['LastModified'])}")
            get_res = s3api.get_object(
                Bucket=args.bucket, Key=obj, VersionId=v["VersionId"]
            )
        except Exception as ex:
            print(ex)
            continue

        sub_dir = str(v["LastModified"]).replace(" ", "-")
        os.makedirs(os.path.join(dest_dir, sub_dir), exist_ok=True)
        with open(os.path.join(dest_dir, sub_dir, obj), "wb") as f:
            f.write(get_res["Body"].read())