Show sys.version when -V option is supplied twice.

[methane]

BPO	28532
Nosy	@vstinner, @ned-deily, @methane, @vadmium, @matrixise
PRs	[Do Not Merge] Convert Misc/NEWS so that it is managed by towncrier #552
Files	verbose-version.patch verbose-version2.patch verbose-version3.patch vervose-version-doc.patch vervose-version-doc2.patch

^{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/methane'
closed_at = <Date 2016-11-24.08:22:19.184>
created_at = <Date 2016-10-25.17:51:01.399>
labels = ['interpreter-core', 'easy', 'type-bug', '3.7']
title = 'Show sys.version when -V option is supplied twice.'
updated_at = <Date 2017-03-31.16:36:12.215>
user = 'https://github.com/methane'

bugs.python.org fields:

activity = <Date 2017-03-31.16:36:12.215>
actor = 'dstufft'
assignee = 'methane'
closed = True
closed_date = <Date 2016-11-24.08:22:19.184>
closer = 'methane'
components = ['Interpreter Core']
creation = <Date 2016-10-25.17:51:01.399>
creator = 'methane'
dependencies = []
files = ['45221', '45272', '45276', '45585', '45608']
hgrepos = []
issue_num = 28532
keywords = ['patch', 'easy']
message_count = 16.0
messages = ['279428', '279705', '279706', '279707', '279710', '279714', '279720', '281345', '281348', '281349', '281351', '281352', '281392', '281555', '281586', '281617']
nosy_count = 6.0
nosy_names = ['vstinner', 'ned.deily', 'methane', 'python-dev', 'martin.panter', 'matrixise']
pr_nums = ['552']
priority = 'high'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue28532'
versions = ['Python 3.6', 'Python 3.7']

[methane]

As discussed on python-dev, this patch adds -VV option to python cmdline.

$ ./python -V
Python 3.6.0b2+
$ ./python -VV
Python 3.6.0b2+ (3.6:84a3c5003510+, Oct 26 2016, 02:47:38) 
[GCC 6.2.0 20161005]

The patch includes doc and man update.
Please see, especially my English.

[matrixise]

" -V : print the Python version number and exit (also --version)\n\
+ when given twice, print more information about build\n\
+ can be supplied multiple times to show more information\n\"

Why do you indicate "multiple times" because there are only 2 possibilites, -V or -VV, no more.

[methane]

Since I'm not good English writer, I copied & modified from -v option.
-VVV is same to -VV, similar to -vvv is same to -vv.

-v : verbose (trace import statements); also PYTHONVERBOSE=x
can be supplied multiple times to increase verbosity

[matrixise]

yep, but in this case, just add -VV will add more details about the current revision.

About -VVV or -VV, yes, it's similar because the same C code version >= 2, Py_GetVersion()

[vadmium]

I left some review comments. Also (as a native English speaker), I think it is okay to drop the third line about “multiple times”. You already say it may be given twice in the line above.

[vadmium]

Sorry, I should have said: the other two files (Misc/python.man and Modules/main.c) also need an extra “the”, like you changed in Doc/using/cmdline.rst.

Other than that, it looks okay to me. But I guess you could add a quick test case in Lib/test/test_cmd_line.py. There’s already one for single -V and --version.

[methane]

Oh, it seems I hurried too much.
Thanks to pointing it out.

[methane]

I noticed today is code freeze for final beta.
Is this too late for 3.6.0?

[vadmium]

Ned indicated he was open to the idea: <http://mid.mail-archive.com/nu39u2$9ri$1@blaine.gmane.org\>. Maybe just double check; there’s still a few hours left!

I’m not sure, but maybe there should be “.. versionchanged:: 3.6” in the RST documentation, and an entry in What’s New?

[vstinner]

verbose-version3.patch LGTM and seems useful to me.