lambda function in python to shut ec2 at the time zone

import boto3
def lambda_handler(event, context):
    client = boto3.client('ec2')
    ec2_regions = [region['RegionName'] for region in client.describe_regions()['Regions']]
    for region in ec2_regions:
        ec2 = boto3.resource('ec2',region_name=region)
        instances = ec2.instances.filter(Filters=[{'Name': 'instance-state-name', 'Values': ['running']}])
        RunningInstances = [instance.id for instance in instances]
        for i in RunningInstances:
            stoppingInstances = ec2.instances.stop(i)
            print(stoppingInstances)
NOTE- You may require indentation formatting if you use this code.