title: Boto3 updating multiple values
body: <p>in the boto3 documentation updating an item is described by this example:</p>
  
  <pre><code>table.update_item(
      Key={
          'username': 'janedoe',
          'last_name': 'Doe'
      },
      UpdateExpression='SET age = :val1',
      ExpressionAttributeValues={
          ':val1': 26
      }
  )
  </code></pre>
  
  <p>But what am i supposed to do, if i want to update several values of the item. I couldn't find any information on this. Can anybody help? Thank you!</p>
  
  <p>EDIT:</p>
  
  <p>Ok, it seems to work like this, can anybody confirm wether this is the right way. Just to be sure i'm not doing anything totally wrong here.</p>
  
  <pre><code>table.update_item(
                      Key={
                          'id': item['id']
                      },
                      UpdateExpression='SET value1 = :val1, value2 = :val2',
                      ExpressionAttributeValues={
                          ':val1': someValue1,
                          ':val2': someValue2
                      }
                  )
  </code></pre>
  
  <p>Thanks!</p>