Checks all Subnets in all Regions for those with less than 20 available IP addresses

getAvailableIPs.py

import boto3

# Define the connection
client = boto3.client('ec2')

# Get all Regions
response = client.describe_regions()

# Create an Array for Region Names
RegionNames = []

# Fill the Region Names Array
Regions = response['Regions']
for i in Regions:
    RegionNames.append(i['RegionName'])

# Get all Subnet IDs for each Region
print("Checking all regions for Subnets with Less than 20 Available IP Addresses")
for region in RegionNames:
    client = boto3.client('ec2', region_name=region)
    response = response = client.describe_subnets()
    SubnetInfo = response['Subnets']
    for i in SubnetInfo:
        if (i['AvailableIpAddressCount'] < 20):
            print(str(i['SubnetId']) + ' in ' + region + ' has ' + str(i['AvailableIpAddressCount']) + ' available IPs')


# Send final Comment
print("Checked all regions")