code: def get_hw_platform(self, udi):
          
          platform = None
          try:
              pid = udi['pid']
              if pid == '':
                  self.log("Empty PID. Use the hw family from the platform string.")
                  return self.raw_family
              match = re.search(self.pid2platform_re, pid)
              if match:
                  platform = match.group(1)
          except KeyError:
              pass
          return platform
docs: Return th HW platform information from the device.