When to use dynamodb.client, dynamodb.resource and dynamodb.Table?

dynamodb.client provide a low level access directly to the DynamoDB apis. You can call only the apis listed here.

The service resource objects like dynamodb.resource provides a more object oriented way of access the AWS resources. DynamoDB is a fairly straightforward service in terms of the different kinds of things you create in AWS. (Basically the main object you create are tables, as opposed to a service like EC2 where you have many different kinds of objects (instances, security groups, launch configurations, etc).

The dynamodb.Table object provides a simplified way of accessing the data in the table. It will marshall and unmarshall the data automatically from the DynamoDB format to a simpler for you.

Format examplesUsing the dynamodb.Client data might look like this

{  "id": {    "S": "a unique id"  },  "date": {    "N": "12345678901234"  }}

Whereas using the Table resource you will get data that looks like this

{  "id": "a unique id",  "date": 12345678901234}

I recommend using the Table resources since it simplifies data access.

They are three different ways of doing the same thing, via slightly different syntax. Pick which ever one you like.