[Python-Dev] PEP 408 -- Standard library preview package (original) (raw)

Michael Foord fuzzyman at voidspace.org.uk
Fri Jan 27 16:39:44 CET 2012

On 27/01/2012 15:35, Matt Joiner wrote:

A more normal incantation, as is often the way for packages that became parts of the standard library after first being a third party library (sometimes under a different name, e.g. simplejson -> json):

try: from preview import thing except ImportError: import thing So no need to target a very specific version of Python. I think this is suboptimal, having to guess where modules are located, you end up with this in every module: try: import cjson as json except ImportError: try: import simplejson as json except ImportError: import json as json

It's trivial to wrap in a function though - or do the import in one place and then import the package from there.

Michael

Perhaps the versioned import stuff could be implemented (whatever the syntax may be), in order that something like this can be done instead:

import regex('preview') import regex('3.4') Where clearly the preview version makes no guarantees about interface or implementation whatsoever. etc.

-- http://www.voidspace.org.uk/

May you do good and not evil May you find forgiveness for yourself and forgive others May you share freely, never taking more than you give. -- the sqlite blessing http://www.sqlite.org/different.html

More information about the Python-Dev mailing list