To list all elastic network interface to get more info

list-eni.py

#!/usr/bin/python3
import boto3
import csv
from prettytable import PrettyTable

# Input all regions that you used in your aws accounts
regions = ['us-east-1', 'ap-southeast-1', 'ap-northeast-1'] 
all_enis = []
for region in regions:
  ec2 = boto3.client('ec2', region_name=region) 
  enis = ec2.describe_network_interfaces()['NetworkInterfaces']
  all_enis.extend(enis)

def get_eni_info():
  table = PrettyTable(['REGION', 'ENI ID', 'Type', 'Public IP', 'Description', 'Instance ID'])
  enis = ec2.describe_network_interfaces()['NetworkInterfaces']
  for eni in all_enis:
    eni_id = eni['NetworkInterfaceId']
    public_ip = eni['Association']['PublicIp'] if 'Association' in eni and 'PublicIp' in eni['Association'] else '-'
    description = eni['Description']
    instance_id = eni['Attachment']['InstanceId'] if 'Attachment' in eni and 'InstanceId' in eni['Attachment'] else '-'
    # Get ENI region
    eni_region = ec2.describe_network_interfaces(
      Filters=[{
          'Name': 'network-interface-id',
          'Values': [eni_id]
      }]  
    )['NetworkInterfaces'][0]['AvailabilityZone'][:-1]    
    table.add_row([ eni_region , eni['NetworkInterfaceId'], eni['InterfaceType'], public_ip, description, instance_id])
  print(table)
  ###############################################
  # Uncomment below part if you want csv output #
  ###############################################
  
  # with open('eni_info.csv', 'w', newline='') as file:
  #   writer = csv.writer(file)  
  #   writer.writerow(table.field_names)
  #   for row in table._rows:
  #     writer.writerow(row)
  # print("Results exported to eni_info.csv")

if __name__ == '__main__':
  get_eni_info()