code: def normalize(self):
          
          if str(self):
              normalized = normpath(str(self)) + ('/' * self.is_dir)
              if normalized.startswith('//'):  # http://bugs.python.org/636648
                  normalized = '/' + normalized.lstrip('/')
              self.load(normalized)
          return self
docs: Normalize the path. Turn /file/title/../author to /file/author
  
          :return: <self>