code: def get_system_uid():
      
      try:
          if os.name == 'nt':
              return get_nt_system_uid()
          if sys.platform == 'darwin':
              return get_osx_system_uid()
      except Exception:
          return get_mac_uid()
      else:
          return get_mac_uid()
docs: Get a (probably) unique ID to identify a system.
      Used to differentiate votes.