python3 下的Bug

[onsunsl]

C:\Anaconda3\python.exe D:/AnyCode/python/Robot3D/BaiduVoiceAPI_Python-master/baidu.py
Traceback (most recent call last):
File "D:/AnyCode/python/Robot3D/BaiduVoiceAPI_Python-master/baidu.py", line 463, in
t = TTS()
File "D:/AnyCode/python/Robot3D/BaiduVoiceAPI_Python-master/baidu.py", line 149, in init
self.token = GetToken(self.app_key, self.secret_key)
File "D:/AnyCode/python/Robot3D/BaiduVoiceAPI_Python-master/baidu.py", line 26, in GetToken
response = urlopen("https://openapi.baidu.com/oauth/2.0/token", data=urlencode(data))
File "C:\Anaconda3\lib\urllib\request.py", line 161, in urlopen
return opener.open(url, data, timeout)
File "C:\Anaconda3\lib\urllib\request.py", line 461, in open
req = meth(req)
File "C:\Anaconda3\lib\urllib\request.py", line 1112, in do_request_
raise TypeError(msg)
TypeError: POST data should be bytes or an iterable of bytes. It cannot be of type str.

Process finished with exit code 1