import json
import boto3
from datetime import datetime

def lambda_handler(event, context):
    envName = str(event['env-name'])

    instance_type = ''
    curr_hour = (datetime.now() + timedelta(hours=9)).hour

    print(curr_hour)
    
    if(curr_hour == 11): #11時に上げる
        instance_type = 'c5.xlarge'
    elif(curr_hour == 13): #13時に下げる
        instance_type = 't3.micro'
    else:
        return 'NONE'

    client = boto3.client('elasticbeanstalk', region_name="ap-northeast-1")

    response = client.update_environment(
        EnvironmentName=envName,
        OptionSettings=[
            {
                'Namespace': 'aws:autoscaling:launchconfiguration',
                'OptionName': 'InstanceType',
                'Value': instance_type,
            }
        ],
    )

    return {
        'statusCode': 200,
        'body': json.dumps('Hello from Lambda!')
    }

{
  "env-name": "app-env"
}