Alex Hall <mehg...@gmail.com> writes:
> I am just curious: if Python3.x is already out, why is 2.7 being
> released? Are there two main types of Python?
Python 3.x brings improvements that break backward compatibility:
Python 3.0 (a.k.a. "Python 3000" or "Py3k") is a new version of the
language that is incompatible with the 2.x line of releases. The
language is mostly the same, but many details, especially how
built-in objects like dictionaries and strings work, have changed
considerably, and a lot of deprecated features have finally been
removed. Also, the standard library has been reorganized in a few
prominent places.
<URL:http://www.python.org/download/releases/3.0/>
For that reason, when Python 3.x was being planned, the Python
developers committed to supporting Python 2.x with backward-compatible
releases for an indeterminate length of time to allow third-party
libraries to steadily migrate to Python 3.x so it becomes more
attractive to use it for all new development.
Python 2.7 has been announced to be the last feature release in the 2.x
series:
Python 2.7 is scheduled to be the last major version in the 2.x
series before it moves into 5 years of bugfix-only mode.
<URL:http://www.python.org/download/releases/2.7/>
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Ben Finney
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