Comparing boto3 resource vs client

resource_v_client.py

# Boto3 examples showing difference between client and resource
#

import boto3
from boto3.dynamodb.conditions import Key
from botocore.config import Config
from pprint import pprint

my_config = Config(
    region_name = 'us-east-1'
)


# Using DDB Table Resource
dynamodb = boto3.resource('dynamodb', region_name='us-east-1')
table = dynamodb.Table('test-table')
response = table.query(
  KeyConditionExpression=Key('PK').eq('d570e177-0378-44b3-82fb-2d08dfd4d254') & Key('SK').begins_with('NODE#')
)
pprint(response)

# Example: Updating an item in DDB
response = table.update_item(
    Key={
      'PK': 'd570e177-0378-44b3-82fb-2d08dfd4d254',
      'SK': 'INFO'
    },
    UpdateExpression="SET session_code = :code",
    ExpressionAttributeValues={
      ":code": "12345"
    },
    ReturnValues="UPDATED_NEW"
)
print(response)


# Using DDB Client
dynamodb = boto3.client('dynamodb', config=my_config)
response = dynamodb.query(
    TableName='test-table',
    KeyConditionExpression="#pk = :uuid AND begins_with(#sk, :prefix)",
    ExpressionAttributeValues={
      ":uuid": {"S": "d570e177-0378-44b3-82fb-2d08dfd4d254"},
      ":prefix": {"S": "NODE#"}
    },
    ExpressionAttributeNames={
      "#pk": "PK",
      "#sk": "SK"
    }
)
pprint(response)

###############

# Using EC2 Resource
ec2 = boto3.resource('ec2', region_name='us-east-1')
instance = ec2.Instance('i-000000000XXXXXXXX')
print(instance.private_ip_address)


# Using EC2 Client
ec2 = boto3.client('ec2', config=my_config)
response = ec2.describe_instances(
    InstanceIds=['i-000000000XXXXXXXX']
)
pprint(response['Reservations'][0]['Instances'][0]['PrivateIpAddress'])