Checks every available S3 bucket for a given key

check_all_s3_buckets_for_key.py

#! /usr/bin/env python3

import boto3

s3_client = boto3.client('s3')
s3 = boto3.resource('s3')
buckets_response = s3_client.list_buckets()
KEY = 'KEY_NAME'

for bucket_response in buckets_response['Buckets']:
    bucket_name = bucket_response['Name']
    bucket = s3.Bucket(bucket_name)
    objs = list(bucket.objects.filter(Prefix=KEY))
    if len(objs) > 0 and objs[0].key == KEY:
        print("The key " + KEY + " exists in bucket " + bucket_name)
    else:
        # print("Not in " + bucket_name)
        pass