Can you give a query_set example?

As you have given a save() example.

```
partition_key = _key_for_dt(tweet_data['created_at'])
partition = Tweet.partitions.get_partition(partition_key)
tweet = partition(**tweet_data)
tweet.save()
```

I'm wonder that is how does the following code execute:
`tweet = Tweet.objects.filter(user='Jimmy')`
or if there is only one record in Tweet
`tweet = Tweet.objects.get(user='Jimmy')`
