> I deliberately chose 3.3 because that's the earliest 3.x version I'm aware of that started to see serious adoption. That happened because of what they were r

> I deliberately chose 3.3 because that's the earliest 3.x version I'm aware of that started to see serious adoption. That happened because of what they were referring to - python 3.0 made a terrible decision with string handling that was remedied in 3.3, giving 3.3 significantly better backwards compatibility with 2 than earlier versions of 3 had.