An Example of wrapping s3 operations with a CLI utility

s3_get_or_delete.py

import argparse
import boto3

s3 = boto3.client('s3')


def get_file(bucket, file):
    s3.download_file(bucket, file, file)
    return


def delete_file(bucket, file):
    if input("Are you sure you want to delete {}?".format(file)).lower() == "yes":
        try:
            s3.delete_object(Bucket=bucket, Key=file)
        except Exception as e:
            print("File Not Found")
    else:
        return


def main():
    parser = argparse.ArgumentParser(description="Build Metadata files.")
    parser.add_argument('--operation', required=True)
    parser.add_argument('--bucket', required=True)
    parser.add_argument('--key', required=True)
    args = parser.parse_args()

    if args.operation == "delete":
        delete_file(args.bucket, args.key)
    elif args.operation == "get":
        get_file(args.bucket, args.key)
    else:
        print("Operation not supported. try delete or get.")

if __name__ == '__main__':
    main()