text: # Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
  import os
  
  from maskrcnn.utils.imports import import_file
  
  
  def setup_environment():
      """Perform environment setup work. The default setup is a no-op, but this
      function allows the user to specify a Python source file that performs
      custom setup work that may be necessary to their computing environment.
      """
      custom_module_path = os.environ.get("TORCH_DETECTRON_ENV_MODULE")
      if custom_module_path:
          setup_custom_environment(custom_module_path)
      else:
          # The default setup is a no-op
          pass
  
  
  def setup_custom_environment(custom_module_path):
      """Load custom environment setup from a Python source file and run the setup
      function.
      """
      module = import_file("maskrcnn.utils.env.custom_module", custom_module_path)
      assert hasattr(module, "setup_environment") and callable(
          module.setup_environment
      ), (
          "Custom environment module defined in {} does not have the "
          "required callable attribute 'setup_environment'."
      ).format(
          custom_module_path
      )
      module.setup_environment()
  
  
  # Force environment setup when this module is imported
  setup_environment()
  