boto3をインストール

$ pip3 install boto3

s3にアクセスするための設定がファイル

aws.py

import boto3

s3 = boto3.client(
    's3',
    aws_access_key_id = {access key},
    aws_secret_access_key = {secret_access_key},
    region_name = 'ap-northeast-1')
    
s3_bucket = 'sample-app'

s3を操作するメソッドを作成

services/s3_service.py

from aws import s3, s3_bucket

class S3Service:

    # オブジェクトの中身を取得
    def get_object():
        s3_dir = 'image/sample.json'
        sample_json = s3.get_object(Bucket=s3_bucket, Key=s3_dir)
        body = sample_json['Body'].read()

        print(body.decode('utf-8'))

    # 複数のオブジェクト取得
    def get_objects(id):
        s3_dir = 'image/{0}/'.format(id)
        image_objs = s3.list_objects_v2(Bucket=s3_bucket, Prefix=s3_dir)

        for image in image_objs['Contents']: 
            print(image['Key'])

    # 複数のオブジェクト削除
    def delete_objects(id):
        s3_dir = 'image/{0}/'.format(id)
        image_objs = s3.list_objects_v2(Bucket=s3_bucket, Prefix=s3_dir)

        for obj in image_objs['Contents']: 
            key = obj['Key']
            s3.delete_object(Bucket=s3_bucket, Key=key)

serviceクラスを呼び出す

controller/image_controller.py

from flask import Blueprint, make_response
from services.s3_service import S3Service

# set route
sample_controller = Blueprint('sample_controller_router', __name__)

@sample_controller.route('/delete/<id>', methods=['PUT'])
def delete_images(id):
   S3Service.delete_objects(id)
   return make_response(jsonify({'code': 200}))