code: def FormatContext(self):
      
      text = ''
      if hasattr(self, 'feed_name'):
        text += "In feed '%s': " % self.feed_name
      if hasattr(self, 'file_name'):
        text += self.file_name
      if hasattr(self, 'row_num'):
        text += ":%i" % self.row_num
      if hasattr(self, 'column_name'):
        text += " column %s" % self.column_name
      return text
docs: Return a text string describing the context