About Unicode: It might be right, that this one would not be easy provided in compatible way. But what they did, was worse. They made it unnecessary difficult t

About Unicode: It might be right, that this one would not be easy provided in compatible way. But what they did, was worse. They made it unnecessary difficult to change from Py2 to 3 -- one reason were the literals. In Py2 it was common to use u" for Unicode literals. Py3 did not accept that syntax at all, since every literal was Unicode -- logical, right? Wrong! Just stupid! Thus laying one roadblock for Py3. Many Unicode programs had thousands of places with these literals (syntax error!) -- change every one, and even worse, when you change it, then Py2 will not accept it any more, because in Py2, literals without u are not Unicode any more (and will raise a different error!). In Py3.3 or so, they at last detected the problem and fixed at least this one ... but very late! Many programmers might have turned their backs to Py3 already.