AWS Code Sample

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# # Copyright 2010-2019, Inc. or its affiliates. All Rights Reserved. # # This file is licensed under the Apache License, Version 2.0 (the "License"). # You may not use this file except in compliance with the License. A copy of # the License is located at # # # # This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR # CONDITIONS OF ANY KIND, either express or implied. See the License for the # specific language governing permissions and limitations under the License. # from __future__ import print_function # Python 2/3 compatibility import boto3 import json import decimal from boto3.dynamodb.conditions import Key, Attr # Helper class to convert a DynamoDB item to JSON. class DecimalEncoder(json.JSONEncoder): def default(self, o): if isinstance(o, decimal.Decimal): if o % 1 > 0: return float(o) else: return int(o) return super(DecimalEncoder, self).default(o) dynamodb = boto3.resource('dynamodb', region_name='us-west-2', endpoint_url="http://localhost:8000") table = dynamodb.Table('Movies') fe = Key('year').between(1950, 1959) pe = "#yr, title, info.rating" # Expression Attribute Names for Projection Expression only. ean = { "#yr": "year", } esk = None response = table.scan( FilterExpression=fe, ProjectionExpression=pe, ExpressionAttributeNames=ean ) for i in response['Items']: print(json.dumps(i, cls=DecimalEncoder)) while 'LastEvaluatedKey' in response: response = table.scan( ProjectionExpression=pe, FilterExpression=fe, ExpressionAttributeNames= ean, ExclusiveStartKey=response['LastEvaluatedKey'] ) for i in response['Items']: print(json.dumps(i, cls=DecimalEncoder))

Sample Details

Service: dynamodb

Last tested:

Author: AWS

Type: full-example

On this page: