is there any specific reason for using python 2 instead of 3 or it is just how you guys do it

Python 3 is ten (!) years old and perfectly usable, but it suffers from a well-known, but curious problem where people who occasionally use Python for some light scripting tend to go for Python 2.7. Rarely it's a choice made because of library availability, more often it is because of the perceived ubiquity of Python 2.7 installs on the target user's computer or simply because of a mindset where Python 2.7 is good enough and getting the hang of Python 3 seems like a huge obstacle (it isn't).

I'd love to know why this project specifically chose Python 2.7 too. Python 2 reaches its end of life in 2020, any new Python code should really be written in Python 3.

By the way, if you want to prevent getting a bunch of downvotes like your comment did, be polite! Not including any capitalization or punctuation is considered downright rude by many. Your text reads like a robot's printout.

You forgot one reason not to switch from 2 to 3: Zero benefit. Nothing python 3 does would benefit my scripts to any extend over just using python 2 as I always did. Is learning 3 a huge hurdle? No, it is however in some cases completely unnecessary.

Yeah, for writing scripts like this - python 2: 0% chance of thinking about Unicode. python 3: 5% chance i have to waste time debugging some random str decoding issue, no benefits. why bother?

Why bother? Because Python 2 is EOL in a little less than 2 years.

The NHS chose not to upgrade to from Windows XP and 2003 and look where that got them last year: a massive crypto locker infection.

I suppose unless someone either forks it or keeps delivering patches outside the Python project. That wasn't really an option for Windows XP, but I'm quite sure if it had been then someone would be doing it.