code: def validate_pasted_string(s):
      # Require a URL or an absolute valid path to accept a text object
      parsed = urlparse(s)
      if parsed.scheme in ("file", ""):  # Possibly a local file
          return os.path.exists(parsed.path)
      elif parsed.scheme:
          # Probably http or s3
          return True
      return False
  
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 5 for calling the PathListCtrl obj's underlying member method code with example usage: obj.validate_pasted_string(s) and returns: False, os, True