使用元素列表查询 dynamoDB

Question

I need to design a script that queries dynamoDB with a list of elements.

I've already tried looping over every element of the list, and querying that element and appending the result, but I was wondering if there is a more efficient way of performing that operation.

KeyConditionExpression=Key('id').eq('occupation') & Key('sort').begins_with(locations + '#' + occup + '#' + contract)

The code I've shown above performs a query for a single location, but instead of just one I wonder if I use the list and sort of lower the number of queries.

EG

locations = ['Glasgow','London']

and the result of this to be elements with both locations.

Answer 1

您正在寻找batch_get_item方法，检查这里这个问题的一个例子，boto3文档这里。