import boto3
import botocore
import csv

client = boto3.client('s3')

response = client.list_buckets()
buckets = response['Buckets']
bucket_names =[]
for each_bucket in buckets:
    bucket_names.append({'Bucket' : each_bucket['Name']})


for each_bucket in bucket_names:
    try:
        response = client.get_bucket_tagging(
        Bucket=each_bucket['Bucket'])
        tags = response['TagSet']
        for each_tag in tags:
            if each_tag['Key'] == 'terraformed':
                each_bucket['terraformed'] = each_tag['Value']
            if each_tag['Key'] == 'application_family':
                each_bucket['application_family'] = each_tag['Value']
    except botocore.exceptions.ClientError:
        print('no tags')


columns = ['Bucket',  'terraformed', 'application_family']
with open('s3_buckets.csv', 'w') as csvfile:
    writer = csv.DictWriter(csvfile, fieldnames=columns)
    writer.writeheader()
    writer.writerows(bucket_names)