This will find EC2 resources across multiple accounts and regions (see CONFIG section). Use like, "python swell.py --find myserver"

swell.py

import boto3, argparse, prettytable

# CONFIG START - PUT YOUR PROFILE NAMES AND REGIONS TO SCAN HERE
account_profiles=['abc-prod-account', 'abc-staging-account', 'abc-dev-account']
regions=['us-east-1','us-west-2']
# CONFIG END

def match_in_keys(o, keys, match):
	m = False
	for k in keys:
		if match.lower() in str(o.get(k,'')).lower():
			m = True
	return m

parser=argparse.ArgumentParser()
parser.add_argument('--find', help='Match any internal/external IP or Name tag')
args=parser.parse_args()

matchstr = False
if args.find:
	matchstr = args.find

instances = []
for account in account_profiles:
	for region in regions:
		session = boto3.Session(profile_name=account, region_name=region)
		ec2client = session.client('ec2')
		response = ec2client.describe_instances()
		for reservation in response["Reservations"]:
			for instance in reservation["Instances"]:
				Name = False
				for t in instance.get("Tags",[]):
					if t['Key'] == 'Name':
						Name = t['Value']
				instance["Account"] = account
				instance["Name"] = Name
				search_keys = [
					'InstanceId',
					'PrivateDnsName',
					'PrivateIpAddress',
					'PublicDnsName',
					'Name'
				]
				m = match_in_keys(instance, search_keys, matchstr)
				if m:
					instances.append(instance)


t = prettytable.PrettyTable(['Name', 'InstanceId', 'PrivateIp', 'PublicIp', 'Az', 'Launched', 'State', 'Type', 'Ami', 'Vpc'])
for i in instances:
	t.add_row([i.get('Name'), i.get('InstanceId'), i.get('PrivateIpAddress'), i.get('PublicIpAddress'), i['Placement']['AvailabilityZone'], i.get('LaunchTime'), i['State']['Name'], i.get('InstanceType'), i.get('ImageId'), i.get('VpcId')])
print(t)