AWS boto3 Difference between batch writer and batch write item

Question

I'm currently applying boto3 with dynamodb, and I noticed that there are two types of batch write

batch_writer is used in tutorial, and it seems like you can just iterate through different JSON objects to do insert (this is just one example, of course)

batch_write_items seems to me is a dynamo-specific function. However, I'm not 100% sure about this, and I'm not sure what's the difference between these two functions (performance, methodology, what not)

Do they do the same thing? If they are, why having 2 different functions? If they're not, what's the difference? How's the performance comparison?

Answer 1

As far as I understand and use these APIs, with the batch_write_item(), you can even handle the data for more than one table in one query. But with batch_writer(), it means you are going to specify the actions are only applicable for a certain table. I think that should be the very basic difference I can tell you.