Version number handling

[akuchling]

BPO	550364
Nosy	@akuchling, @rhettinger
Files	patch.version: Add sysconfig.get_python_version()

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/akuchling'
closed_at = <Date 2002-11-14.01:45:12.000>
created_at = <Date 2002-04-29.20:28:54.000>
labels = ['library']
title = 'Version number handling'
updated_at = <Date 2002-11-14.01:45:12.000>
user = 'https://github.com/akuchling'

bugs.python.org fields:

activity = <Date 2002-11-14.01:45:12.000>
actor = 'akuchling'
assignee = 'akuchling'
closed = True
closed_date = None
closer = None
components = ['Distutils']
creation = <Date 2002-04-29.20:28:54.000>
creator = 'akuchling'
dependencies = []
files = ['467']
hgrepos = []
issue_num = 550364
keywords = []
message_count = 6.0
messages = ['10617', '10618', '10619', '10620', '10621', '10622']
nosy_count = 3.0
nosy_names = ['jhylton', 'akuchling', 'rhettinger']
pr_nums = []
priority = 'normal'
resolution = 'accepted'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue550364'
versions = []

[akuchling]

A while ago, Tim Peters mentioned in a check-in message:

"Change the version string from "2.2+" to "2.3a0". distutils
peels off
the first 3 characters of this string in several places, so for as
long
as they remain "2.2" it confuses the heck out of attempts to
build 2.3 stuff using distutils."

It's true; distutils does sys.version[:3] in a few places.
The attached patch factors this out so it'll be easier to
change.

(There's also a Python development issue here, namely when
the version number gets bumped in the CVS tree.)

[rhettinger]

Logged In: YES
user_id=80475

Nice factoring.

Would it be more bulletproof to use sys.version_info
instead of sys.version[:3]? Perhaps, wrap it in try/except
to catch versions before Py2.0.

[akuchling]

Logged In: YES
user_id=11375

Maybe. But I don't know if I still care about 1.5.2. If
I don't, then the code can just always use sys.version_info.

[jhylton]

Logged In: YES
user_id=31392

Do we still care about this patch?

[akuchling]

Logged In: YES
user_id=11375

Probably we can just use sys.version_info, since we don't care about
1.5.2 any more.

[akuchling]

Logged In: YES
user_id=11375

Checked in, since MAL argued convincingly for maintaining
1.5.2 support.