[Dynamo DB] boto3(python) CRUD

DynamoDB는 Amazon에서 AWS에 최적화된 NoSQL 데이터베이스이다.
AWS DynamoDB를 사용하기 위해서 Amazon에서는 각 프로그래밍 언어 별 SDK를 배포하고 있다.

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boto3 설치

pip install boto3 

Create

put_item()

import boto3

def create_data():
    # dynamodb connect
    client = boto3.client('dynamodb')
    dynamodb = boto3.resource('dynamodb')
    # dynamodb table connect
    table = dynamodb.Table('channels')

    # Create
    table.put_item(
        Item = {
            'user_id': '1',
            'first_name': 'Gildong',
            'last_name': 'Hong',
            'age': 30
        }
    )

Read

get_item()

import boto3
from boto3.dynamodb.conditions import Key, Attr

def get_data():
    # dynamodb connect
    client = boto3.client('dynamodb')
    dynamodb = boto3.resource('dynamodb')
    # dynamodb table connect
    table = dynamodb.Table('channels')

    # Read
    # user_id가 1인 row가져오기
    response = table.get_item(
        Key = { 'user_id': '1' }
    )   
    item = response['Items']
    print(item)

Update

update_item()

import boto3

def update_data():
    # dynamodb connect
    client = boto3.client('dynamodb')
    dynamodb = boto3.resource('dynamodb')
    # dynamodb table connect
    table = dynamodb.Table('channels')

    # Update
    table.update_item(
        Key={ 'user_id': '1' },
        UpdateExpression='SET age = :val1',
        ExpressionAttributeValues={
        ':val1': 31
        }
    )

Delete

delete_item()

import boto3

def delete_data():
    # dynamodb connect
    client = boto3.client('dynamodb')
    dynamodb = boto3.resource('dynamodb')
    # dynamodb table connect
    table = dynamodb.Table('channels')

    # Delete
    table.delete_item(
        Key={ 'user_id': 1 }
    )