UPD: added code for cloudformation call back

py/nextSubnetLambda.py

@@ -2,10 +2,12 @@
 To use this function in lambda, one needs to upload netaddr and this code as a package. here is how
 pip3 install netaddr -t ./
 zip -r ../acrolinxNextSubnet.zip .
+
+The cloudformation call back is to be implemented.
 """
 from netaddr import *
 import boto3
-
+#import cfnresponse
 import json
 
 def lambda_handler(event, context):
@@ -17,11 +19,14 @@ def lambda_handler(event, context):
         subnets.append(IPNetwork(subnet.cidr_block))
 
     lastSubnet = sorted(subnets).pop()
+    nextSubnet = str(lastSubnet.next())
 
-    # TODO implement
     return {
        'statusCode': 200,
        'body': json.dumps(str(lastSubnet.next()))
     }
 
-
+#    response_data = {}
+#    response_data = {"cidr": nextSubnet}
+#    my_data = nextSubnet
+#    cfnresponse.send(event,context,cfnresponse.SUCCESS, response_data, my_data)