query a cloudformation stack for it's resources and find the first RestAPI id in it

get_api_id_from_stack.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
.. module:: get_api_id_from_stack
    :synopsis: 


"""
import boto3
import sys

try:
	stack_name = sys.argv[1]

	cloudformation = boto3.client('cloudformation')
	resp = cloudformation.describe_stack_resources(StackName=stack_name)

	for r in resp['StackResources']:
		if r['ResourceType'] == "AWS::ApiGateway::RestApi":
			print r['PhysicalResourceId']
			break

except:
	print 'missing api name'
	sys.exit(1)