How does the Python version numbering scheme work?

Python versions are numbered A.B.C or A.B. A is the major version number — it is only incremented for really major changes in the language. B is the minor version number, incremented for less earth-shattering changes. C is the micro-level — it is incremented for each bugfix release. See PEP 6 for more information about bugfix releases.

Not all releases are bugfix releases. In the run-up to a new major release, a se