Hi, asyncio is a good example because it wants to evolve faster than the whole "CPython package". Each minor version of CPython adds news features in asyncio. It is not always easy to document these changes. Moreover, the behaviour of some functions also changed in minor versions.
asyncio doesn't respect the trend of semantic versions http://semver.org/ The major version should change if the behaviour of an existing function changes. 2016-07-05 10:05 GMT+02:00 Chris Angelico <ros...@gmail.com>: > On the flip side, answering questions like "what version of Python do > people need to run my program" become harder to answer, particularly > if you have third-party dependencies. (The latest version of numpy > might decide that it's going to 'import statistics', for instance.) Recently, I wrote a "perf" module and I wanted to use the statistics module. I was surprised to see that PyPI has a package called "statistics" which just works on Python 2.7. In practice, I can use statistics on Python 2.7, 3.4 and even 3.2 (but I didn't try, this version is too old). It's a matter of describing correctly dependencies. pip supports a requirements.txt file which is a nice may to declare dependency. You can: * specify the minimum library version * make some library specific to some operation systems * skip dependencies on some Python versions -- very helpful for libraries parts of Python 3 stdlib (like statistics) => see Environment markers for conditions on dependencies For perf, I'm using this setup() option in setup.py: 'install_requires': ["statistics; python_version < '3.4'", "six"], > One of the arguments against splitting the stdlib was that corporate > approval for software is often hard to obtain, and it's much easier to > say "I need approval to use Python, exactly as distributed by > python.org" than "I need approval to use Python-core plus these five > Python-stdlib sections". *If* someone wants to split the stdlib into smaller parts and/or move it out of CPython, you should already start to write a PEP. Or you will have to reply to the same questions over and over ;-) Is there a volunteer to write such PEP? Victor _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
