AttributeError: 'datetime.datetime' object has no attribute 'timestamp'

[zero76114]

Please help me,
I try to run preprocess.py, but i met error
AttributeError: 'datetime.datetime' object has no attribute 'timestamp'

I try to change :
--->import datetime as dt
To:
--->from datetime import datetime as dt
But none Efficience
Anyone any idea?

[zero76114]

I knew the reason why, That I implement on python 2.7;
-->It's fine on python 3.4