code: def s3_temp_dir(
      top_directory="top_dir",
      bucket_name="test",
      region_name="us-east-1",
  ):
      """Creates a test S3 bucket and returns directory location.
  
      Args:
        top_directory: The path of the top level S3 directory in which
          to create the directory structure. Defaults to 'top_dir'.
        bucket_name: The S3 bucket name. Defaults to 'test'.
        region_name: The S3 region name. Defaults to 'us-east-1'.
  
      Returns S3 URL of the top directory in the form 's3://bucket/path'
      """
      s3_url = "s3://{}/{}".format(bucket_name, top_directory)
      client = boto3.client("s3", region_name=region_name)
      client.create_bucket(Bucket=bucket_name)
      return s3_url
  
file_path: tensorboard/tensorboard/summary/writer/event_file_writer_s3_test.py
imports: import boto3
  import os
  import unittest
  from tensorboard.summary.writer.event_file_writer import EventFileWriter
  from tensorboard.compat import tf
  from tensorboard.compat.proto import event_pb2
  from tensorboard.compat.proto.summary_pb2 import Summary
  from tensorboard.compat.tensorflow_stub.io import gfile
  from tensorboard.compat.tensorflow_stub.pywrap_tensorflow import PyRecordReader_New
  from moto import mock_s3
  from tensorboard import test
label_desc: Use image node_id 1 for calling a global function with example usage: s3_temp_dir(top_directory, bucket_name, region_name) and returns: s3_url