code: def parseFilename(filename):
      
  
      # Parse out any extension specified in filename
      _indx = filename.find('[')
      if _indx > 0:
          # Read extension name provided
          _fname = filename[:_indx]
          _extn = filename[_indx + 1:-1]
      else:
          _fname = filename
          _extn = None
  
      return _fname, _extn
docs: Parse out filename from any specified extensions.
  
      Returns rootname and string version of extension name.