code: def finished(self, filename):
          
          if len(self.errors) < 1:
              return
  
          element = ET.SubElement(self.checkstyle_element, 'file', name=filename)
          for error in self.errors:
              message = error.code + ' ' + error.text
              prefix = error.code.strip()[0]
              ET.SubElement(element, 'error', {
                  'severity': CHECKSTYLE_SERVERITY.get(prefix, 'info'),
                  'line': str(error.line_number),
                  'column': str(error.column_number),
                  'message': message,
                  'source': CHECKSTYLE_SOURCE.get(prefix, 'undefined code'),
              }
              )
docs: Make Checkystyle ElementTree.