The current tag wiki for python says:
Use the python tag for all Python related questions. If you believe your question includes issues specific to the incompatible Python 2.x or Python 3.x, in addition to the main python tag, use python-2.x or python-3.x. If you believe your question may be even more specific, you can include a version specific tag such as python-2.7.
Thus we currently have 196,054 questions tagged python but only 378 and 6,008 questions tagged python-2.x and python-3.x respectively.
Sadly I have recently noticed that questions and answers using the python tag are significantly devalued by the fact that often neither specify which version of the language they are referring to.
The differences between Python 2 and Python 3 are significant enough that in many cases the answers for each language are worlds apart, especially in the realm of unicode support.
Questioners frequently don't mention which version of python they are using, and even if it is clear from context which they are using then answers often make their own assumptions and fail to mention what those assumptions are.
This makes looking for answers to many python questions time consuming and highly frustrating. When I search for answers to java or C# questions I expect to get the answer I'm looking for in the first few hits, with python my hit rate is substantially lower.
So, what can we do to make the python tag more useful? How can we make it easier to filter by language version when the vast majority of questions aren't version tagged and the tag wiki has such a relaxed attitude to version tagging?