Python 3.x compatibility

[dangkhoasdc]

Hi, I've run your code on Python 3.6; however; it showed the error

len() of unsized object numpy somewhere in Loader.py

In Python 2.x, it works well (except that show APIs are replaced in the newer version of Tensorflow - I have a plan to update the code).

[alfiq]

Hello, I could try to fix it, can some one assign this to me?