Abstract: In this article we discussed on why Python require in Reinforcement Learning(RL). Python languages have a unique ecosystem, cultures and have their own philosophies. Python codes are available as open sources and Python community involvement with local, national and international events and it is helpful for new developers. Python have its wide array of open source code libraries, package management and ability to work well on platforms other than Windows OS. Finally, Python is great for deployment automation and web development and many non-developers are first introduced to the language and ecosystem while getting data analysis work done.