I teach online workshops on intermediate Python to several hundred developers each month, scattered globally. Since these are engineers in the work force, I st

I teach online workshops on intermediate Python to several hundred developers each month, scattered globally. Since these are engineers in the work force, I start each class with a quick poll about which version they primarily use on their jobs: 2.7, or 3.x. 18 months ago, the results were typically 20% Python 3, and 80% Python 2. Over time, the ratio shifted. In recent months, it's VERY consistently 60-70% Python 3; one class it was 80%. As I tell those students: sooner than you think, having only Python 2 on your resume will make it look dated.