code: def is_file(self, idx):
      if idx == self.root_id:
          return False
      return self.is_folder(self.GetItemParent(idx))
  
imports: import logging
  import os
  import sys
  import uuid
  from urllib.request import url2pathname
  from urllib.parse import urlparse
  import wx
  import wx.lib.scrolledpanel
  from cellprofiler_core.pipeline import ImageFile
  from cellprofiler_core.preferences import report_progress
label_desc: Use image node_id 36 for calling the PathListCtrl obj's underlying member method code with example usage: obj.is_file(idx) and returns: self, False