aws-dynamodb-parser

AWS DynamoDB utility for parsing DynamoDB responses


Keywords
aws, lambda, decorator, aws-lambda, dynamodb, python, python-package, python3
License
MIT
Install
pip install aws-dynamodb-parser==0.1.2

Documentation

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Build Status License: MIT PyPI

AWS DynamoDB Parser

AWS DynamoDB utility for parsing DynamoDB responses

Installation

pip install aws-dynamodb-parser

Package Contents

parse

parse is the main method exposed for parsing DynamoDB responses when using boto3.

The parse function can handle all of the data types AWS DynamoDB supports as of October 2020.

Examples

Assuming we have a table TABLE_NAME containing the following entries, with id set as the partition key and timestamp as the sort key.

All three fields included are strings.

id timestamp name
a77b5fc0-75cb-408c-bebf-863873506cce 2020-10-01 13:13:47.388492 First test entry
a77b5fc0-75cb-408c-bebf-863873506cce 2020-10-01 13:15:25.376589 Second test entry
fa853ff0-706e-45db-b6ae-aa6a8a1f7856 2020-10-01 13:16:47.720778 Third test entry

Parsing the result from a get_item request:

import boto3
from aws_dynamodb_parser import parse

dynamodb_client = boto3.client("dynamodb")
response = dynamodb_client.get_item(
    TableName="TABLE_NAME",
    Key={
        "id": {"S": "a77b5fc0-75cb-408c-bebf-863873506cce"},
        "timestamp": {"S": "2020-10-01 13:13:47.388492"}
    }
)

item = response.get("Item", {})
print(item)
# {'id': {'S': 'a77b5fc0-75cb-408c-bebf-863873506cce'}, 'timestamp': {'S': '2020-10-01 13:13:47.388492'}, 'name': {'S': 'First test entry'}}

entry = parse(item)
print(entry)
# {'id': 'a77b5fc0-75cb-408c-bebf-863873506cce', 'timestamp': '2020-10-01 13:13:47.388492', 'name': 'First test entry'}

Parsing the result from a query request:

import boto3
from aws_dynamodb_parser import parse

dynamodb_client = boto3.client("dynamodb")
response = dynamodb_client.query(
    TableName="TABLE_NAME",
    KeyConditionExpression="#id = :id",
    ExpressionAttributeNames={
        "#id": "id"
    },
    ExpressionAttributeValues={
        ":id": {"S": "a77b5fc0-75cb-408c-bebf-863873506cce"}
    }
)

items = response.get("Items", [])
print(items)
# [{'id': {'S': 'a77b5fc0-75cb-408c-bebf-863873506cce'}, 'timestamp': {'S': '2020-10-01 13:13:47.388492'}, 'name': {'S': 'First test entry'}}, {'id': {'S': 'a77b5fc0-75cb-408c-bebf-863873506cce'}, 'timestamp': {'S': '2020-10-01 13:15:25.376589'}, 'name': {'S': 'Second test entry'}}]

entries = parse(items)
print(entries)
# [{'id': 'a77b5fc0-75cb-408c-bebf-863873506cce', 'timestamp': '2020-10-01 13:13:47.388492, 'name': 'First test entry'}, {'id': 'a77b5fc0-75cb-408c-bebf-863873506cce', 'timestamp': '2020-10-01 13:15:25.376589', 'name': 'Second test entry'}]

Documentation

Users can get the docstring help by running:

from aws_dynamodb_parser import parse
help(parse)

Links