Arvados

<tetron> brett: regarding #5136 any thoughts on how to warn the user if they are using Python < 2.7 ?
<brett> tetron: Inspect sys.version_info.
<tetron> so in arvados/__init__.py we should put a test at the top
<brett> Have arvados/__init__.py raise an ImportError or something. Don't see much point warning when it's never going to work.
<tetron> and bail out if sys.version_info isn't 2.7 or greater
<tetron> I'll add a ticket to bug triage
<brett> We should just check that major and minor are exactly 2.7.
<brett> It's not going to work under Python 3 either.
<tetron> er
<tetron> yes
<brett> Well, I guess for total correctness check 2.7 <= v < 3.0.
<tetron> I was thinking more about a hypothetical Python 2.8
<brett> It's never going to happen but sure.
<tetron> brett: #5137