code: def exists(self, target, path, path_sep="/"):
          
          if path.endswith(path_sep):
              path = path[:-len(path_sep)]
          par_dir, filename = path.rsplit(path_sep, 1)
          file_list = self.list_files(target, par_dir)
          out_dict = {}
          for device_id, device_data in six.iteritems(file_list):
              if isinstance(device_data, ErrorInfo):
                  out_dict[device_id] = device_data
              else:
                  out_dict[device_id] = False
                  for cur_file in device_data.files:
                      if cur_file.path == path:
                          out_dict[device_id] = True
                  for cur_dir in device_data.directories:
                      if cur_dir.path == path:
                          out_dict[device_id] = True
  
          return out_dict
docs: Check if path refers to an existing path on the device
  
          :param target: The device(s) to be targeted with this request
          :type target: :class:`devicecloud.sci.TargetABC` or list of :class:`devicecloud.sci.TargetABC` instances
          :param path: The path on the target to check for existence.
          :param path_sep: The path separator of the device
          :return: A dictionary where the key is a device id and the value is either an :class:`~.ErrorInfo` if there
              was a problem with the operation or a boolean with the existence status of the path on that device