python boto3 dynamodb query function dynamic arguments

Question

Python boto3 library dynamodb.query method. how do we pass dynamic arguments

client = boto3.resource("dynamodb")

params = {
    "Limit": 10,
    "ExpressionAttributeNames":{"#pk":"pk"},
    "ExpressionAttributeValues":{":pk":"value"},
    "KeyConditionExpression":"#pk=:pk",
    "ScanIndexForward": False
}
res = client.query(params)

It responds with error:

An error occurred (ValidationException) when calling the Query operation: Either the KeyConditions or KeyConditionExpression parameter must be specified in the request.

Answer 1

尝试使用 ** 正确设置参数：

res = client.query(**params)