Add command-line functionality to uuid module

[f5fd3372-edc3-4555-813b-88415e4a7499]

BPO	44431
Nosy	@serhiy-storchaka, @erlend-aasland, @ephenix
PRs	python/cpython#26751

^{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 = None
closed_at = None
created_at = <Date 2021-06-16.04:14:46.410>
labels = ['type-feature', '3.11']
title = 'Add command-line functionality to uuid module'
updated_at = <Date 2021-06-16.22:06:09.458>
user = 'https://github.com/ephenix'

bugs.python.org fields:

activity = <Date 2021-06-16.22:06:09.458>
actor = 'erlendaasland'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2021-06-16.04:14:46.410>
creator = 'ephenix'
dependencies = []
files = []
hgrepos = []
issue_num = 44431
keywords = ['patch']
message_count = 2.0
messages = ['395906', '395967']
nosy_count = 3.0
nosy_names = ['serhiy.storchaka', 'erlendaasland', 'ephenix']
pr_nums = ['26751']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue44431'
versions = ['Python 3.11']

[f5fd3372-edc3-4555-813b-88415e4a7499]

Suggested functionality:

python -m uuid b9aa5a06-e2cd-4c26-b26b-1590f01ea996

[serhiy-storchaka]

I think it would be a useful feature.

But would not be better to make interface similar to interface of standard Linux command uuidgen? In any case it should support the -h or --help options.

[achhina]

@ephenix would you still like to work on this as I see you've closed your PR? If not, I'd like to work on this; I'll wait a couple of days to give you a chance to respond if you'd still like to continue.

[ephenix]

@ephenix would you still like to work on this as I see you've closed your PR? If not, I'd like to work on this; I'll wait a couple of days to give you a chance to respond if you'd still like to continue.

I lost track of this -- feel free to take my pull request and do anything necessary to get it merged. IIRC the changes I made were working.

[gpshead]

thanks for the contribution.

[serhiy-storchaka]

Thank you for your contribution @achhina. But I have few nitpicks:

1. Most CLI tools on Unix and Linux use minus followed by a single letter as short options, and double minus followed by a sequence of letters as long option. An alternative style used in minority of commands (e.g. find and java) use single minus for long options. But your proposition mixes the styles: there are short options like -u, long options like --name, and also long option with a single minus -ns. argparse of course supports both styles, but I was surprised that it supports a mix, and I am not sure that it will not be broken in future (-ns can be interpreted as two separate options -n and -s).
2. Standard Linux utility uuidgen has similar interface, but conflicting short options. -n is a short alias of --namespace, and -N is a short alias of --name. As you see option -n has different semantic.
3. uuidgen accepts namespace argument in form: @dns @url @oid @x500. In your proposition it should be in form: NAMESPACE_DNS NAMESPACE_URL NAMESPACE_OID NAMESPACE_X500. And it is not documented.

I propose to rename -n to -N and -ns to -n, and accept simpler compatible namespace syntax.

[achhina]

@serhiy-storchaka that makes sense, I can create a follow-up patch in regards to the proposed changes if everyone agrees - cc @gpshead.

[gpshead]

Good thinking Serhiy, those changes makes sense to me.

[gpshead]

Just @ me on the PR when you've created one @achhina.

[gpshead]

thanks for the contribution!