code: def Parse(self, stat, file_object, knowledge_base):
      
      _, _ = stat, knowledge_base
      lines = [
          l.strip()
          for l in utils.ReadFileBytesAsUnicode(file_object).splitlines()
      ]
      for index, line in enumerate(lines):
        user = self.ParseLine(index, line)
        if user is not None:
          yield user
docs: Parse the passwd file.