[3.26][py3] Fix `AttributeError: 'str' object has no attribute 'decode'`
$ python2
>>> str('a').decode('utf-8')
u'a'
$ python3
>>> str('a').decode('utf-8')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'str' object has no attribute 'decode'