Traceback (most recent call last):


 "/usr/lib/python3.6/code.py", line 91, in runcode

exec(code, self.locals)


 "<console>", line 1, in <module>
AttributeError: 'NoneType' object has no attribute 'send'

Traceback (most recent call last):


 "/usr/lib64/python3.6/multiprocessing/queues.py", line 234, in _feed

obj = _ForkingPickler.dumps(obj)


 "/usr/lib64/python3.6/multiprocessing/reduction.py", line 51, in dumps

cls(buf, protocol).dump(obj)
AttributeError: Can't pickle local object 'FeatureExtracter.<locals>.feature_extracter_fwd'
