code: def locate_remote_file(module_path):
      """xparl has to locate the file that has the class decorated by parl.remote_class.
  
      If the entry_path is the prefix of the absolute path of the module, which means the
      file of the module is in the directory of entry or its subdirectories, this function
      will return the relative path between this file and the entry file.
  
      Otherwise, it means that the user accesses the module by adding the path of the
      module to the environment path (sys.path), this function will return the module_path
      directly and the remote job also need access the module by adding the path of the
      module to the sys.path.
  
      Note that this function should support the jupyter-notebook environment.
  
      Args:
          module_path: Absolute path of the module, where the class decorated by
                       parl.remote_class is located.
  
      Returns:
          (return_path, in_sys_path)
  
          return_path(str): relative path of the module, if the entry_path is the prefix of the absolute
                            path of the module, else module_path.
  
          in_sys_path(bool): False, if the entry_path is the prefix of the absolute path of the module,
                             else True.
      Example:
          module_path: /home/user/dir/subdir/my_module (or) ./dir/main
          entry_file: /home/user/dir/main.py
          --------> return_path: subdir/my_module
  
          module_path: /home/user/other_dir/subdir/my_module
          entry_file: /home/user/dir/main.py
          --------> return_path: /home/user/other_dir/subdir/my_module
  
          module_path: ../other_dir/subdir/my_module
          entry_file: /home/user/dir/main.py
          --------> return_path: ../other_dir/subdir/my_module
      """
      if isnotebook():
          entry_path = os.getcwd()
      else:
          entry_file = sys.argv[0]
          entry_file = entry_file.split(os.sep)[-1]
          entry_path = None
          for path in sys.path:
              to_check_path = os.path.join(path, entry_file)
              if os.path.isfile(to_check_path):
                  entry_path = path
                  break
  
      if entry_path is None:
          raise FileNotFoundError("cannot locate the remote file")
  
      # fix pycharm issue: https://github.com/PaddlePaddle/PARL/issues/350
      module_path = format_uniform_path(module_path)
      entry_path = format_uniform_path(entry_path)
  
      # transfer the relative path to the absolute path
      abs_module_path = module_path
      if not os.path.isabs(abs_module_path):
          abs_module_path = os.path.abspath(abs_module_path)
  
      if (
          os.sep in abs_module_path
          and entry_path != abs_module_path[: len(entry_path)]
      ):
          # the file of the module is not in the directory of entry or its subdirectories
          return module_path, True
  
      if os.sep in abs_module_path:
          relative_module_path = (
              "." + abs_module_path[len(entry_path) :]
          )
      else:
          relative_module_path = abs_module_path
  
      return relative_module_path, False
  
file_path: PARL/parl/remote/remote_class_serialization.py
imports: import os
  import cloudpickle
  import sys
  import inspect
  from parl.utils import isnotebook, format_uniform_path
label_desc: Use image node_id 3 for calling a global function with example usage: locate_remote_file(module_path) and returns: relative_module_path,  False, module_path,  True