＆＃39;的SyntaxError＆＃39;在Python中解压缩dict

Question

当我尝试运行pychromecast库的示例时，我遇到以下故障：

~/pychromecast $ python example.py 
Traceback (most recent call last):
File "example.py", line 11, in <module>
import pychromecast.controllers.youtube as youtube
File "/home/pi/pychromecast/pychromecast/controllers/youtube.py", line 27
REQUEST_PARAMS_SET_PLAYLIST = {**BASE_REQUEST_PARAMS, **SET_PLAYLIST_METHOD}
                                ^
SyntaxError: invalid syntax

我已经尝试在Python2和Python3中运行它。这有什么不对？