text: 
  from __future__ import print_function
  import urllib3
  import json
  import boto3
  
  
  http = urllib3.PoolManager()
  
  def send(event, context, responseStatus, responseData, physicalResourceId=None, noEcho=False, reason=None):
      responseUrl = event['ResponseURL']
  
      print(responseUrl)
  
      responseBody = {
          'Status': responseStatus,
          'Reason': reason or "See the details in CloudWatch Log Stream: {}".format(context.log_stream_name),
          'PhysicalResourceId': physicalResourceId or context.log_stream_name,
          'StackId': event['StackId'],
          'RequestId': event['RequestId'],
          'LogicalResourceId': event['LogicalResourceId'],
          'NoEcho': noEcho,
          'Data': responseData
      }
  
      json_responseBody = json.dumps(responseBody)
  
      print("Response body:")
      print(json_responseBody)
  
      headers = {
          'content-type': '',
          'content-length': str(len(json_responseBody))
      }
  
      try:
          response = http.request('PUT', responseUrl, headers=headers, body=json_responseBody)
          print("Status code:", response.status)
  
  
      except Exception as e:
  
          print("send(..) failed executing http.request(..):", e)
  
  
  def lambda_handler(event, context):
      ec2 = boto3.client('ec2')
      vpc_response = ec2.describe_vpcs(
          Filters=[
              {
                  'Name': 'is-default',
                  'Values': [
                      'true'
                  ]
              }
          ]
      )
      vpc_id = vpc_response['Vpcs'][0]['VpcId']
  
      subnet_response = ec2.describe_subnets(
          Filters=[
              {
                  'Name': 'vpc-id',
                  'Values': [
                      vpc_id
                  ]
              }
          ]
      )
      subnet_ids = [subnet['SubnetId'] for subnet in subnet_response['Subnets']]
  
      response_data = {
          'VpcId': vpc_id,
          'Subnets': subnet_ids
      }
  
      return send(event, context, "SUCCESS", response_data)
  