code: def s3(aws_credentials):
      """Create a mock s3 for testing."""
      with mock_s3():
          yield boto3.client("s3", region_name="us-east-1")
  
imports: import os
  import boto3
  import pytest
  from moto import mock_s3
  from pycaret.internal.persistence import deploy_model, load_model
label_desc: Use image node_id 2 for calling a global function with example usage: s3(aws_credentials) without return types