Upgrade from Python2.7 to Python3

[vasudev-sharma]

Hi, I am Vasudev and very much interested in Machine Learning particularly Deep Learning R&D. Your open source software Fabrik is pretty much valuable and impressive to both researchers and a novice in the field of AI. I would like to contribute in this project.

I would like to mention a small improvement

Since Python 2.7 will reach the end of its life on January 1st, 2020 and it wouldn't be maintained afterwards, I think Fabrik should be upgraded to Python3. Though I didn't check out it's compatibility with Python3, it maybe also that it's working perfectly well with Python3.

I have some minor suggestions which might be relevant: -
TODO

• To upgrade from Python2.7 toPython3as it is maintained by the community.
• Document changes regarding the same.

Thanks!