TypeError: 'map' object is not subscriptable

[StormArcher]

Traceback (most recent call last):
File "run.py", line 75, in
tracker.init([ix,iy,w,h], frame)
File "/home/hp/zjc/nk_PyCharm/PyCharm_project/nk_KCF/3_uoip-KCFpy
/KCFpy/kcftracker.py", line 269, in init
self._tmpl = self.getFeatures(image, 1)
File "/home/hp/zjc/nk_PyCharm/PyCharm_project/nk_KCF/3_uoip-KCFpy
/KCFpy/kcftracker.py", line 185, in getFeatures
cx = self._roi[0] + self._roi[2]/2 #float
TypeError: 'map' object is not subscriptable

[StormArcher]

ｉthink it version problem ,i use python 3