import boto3

client = boto3.client('lambda')

response = client.list_functions(
    MaxItems=123
)


lambdas = response['Functions']
contains_app_family = []
for function in lambdas:
    tags = client.list_tags(Resource=function['FunctionArn'])['Tags']
    if 'application_family' in tags:
            contains_app_family.append({'service_arn': function['FunctionArn']})


percent = ( len(contains_app_family) / len(lambdas)) * 100

print('Amount of services: ' + str(len(lambdas)))
print('Contains app family tag: ' + str(len(contains_app_family)))
print('Percent ' + str(int(percent)) + '%')