code: def test_set_s3_credentials():
      try:
          test_set_s3_credentials_impl()
      finally:
          remove_s3_credentials()
  
imports: import h2o
  import os
  from h2o.exceptions import H2OValueError
  from h2o.persist import set_s3_credentials
  from h2o.persist import remove_s3_credentials
  from tests import pyunit_utils
label_desc: Use image node_id 1 for calling a global function with example usage: test_set_s3_credentials() without return types