title: Adding TTL to DynamoDB records via Python3 & Boto3
body: <p>I have the following Pyhton3/Boto3 script that connects to a AWS DynamoDB table and attempts to set a 19-day TTL on all its records by looping through them:</p>
  
  <pre><code>#!/usr/bin/env python3
  import boto3
  import sys
  from datetime import datetime, timedelta
  from boto3.dynamodb.conditions import Key, Attr
  
  client = boto3.resource('dynamodb')
  
  ttl = 19    # The TTL in number of DAYS
  
  myTable = client.Table('MyTable')
  
  pe = "logId, id, created"
  delCount = 0
  
  try:
      response = integrationLogTable.scan(
          ProjectionExpression=pe,
          )
      while 'LastEvaluatedKey' in response:
          response = integrationLogTable.scan(
              ProjectionExpression=pe,
              ExclusiveStartKey=response['LastEvaluatedKey']
              )
  
          for i in response['Items']:
              # ???
  
  except ClientError as e:
      print(e.response['Error']['Message'])
  </code></pre>
  
  <p>I'm struggling with how to actually add the 19-day TTL to all my records...<strong>any ideas?</strong></p>