Let math.dist() accept coordinates as sequences

[rhettinger]

BPO	37691
Nosy	@tim-one, @rhettinger, @mdickinson
PRs	bpo-37691: Let math.dist() accept sequences and iterables for coordinates #14975 [3.8] bpo-37691: Let math.dist() accept sequences and iterables for coordinates (GH-14975) #14984

^{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/rhettinger'
closed_at = <Date 2019-07-27.21:27:32.563>
created_at = <Date 2019-07-27.05:28:58.011>
labels = ['3.8', 'library', '3.9']
title = 'Let math.dist() accept coordinates as sequences'
updated_at = <Date 2019-07-27.21:27:32.562>
user = 'https://github.com/rhettinger'

bugs.python.org fields:

activity = <Date 2019-07-27.21:27:32.562>
actor = 'rhettinger'
assignee = 'rhettinger'
closed = True
closed_date = <Date 2019-07-27.21:27:32.563>
closer = 'rhettinger'
components = ['Library (Lib)']
creation = <Date 2019-07-27.05:28:58.011>
creator = 'rhettinger'
dependencies = []
files = []
hgrepos = []
issue_num = 37691
keywords = ['patch']
message_count = 3.0
messages = ['348541', '348565', '348566']
nosy_count = 3.0
nosy_names = ['tim.peters', 'rhettinger', 'mark.dickinson']
pr_nums = ['14975', '14984']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue37691'
versions = ['Python 3.8', 'Python 3.9']

[rhettinger]

I did some user testing with Python 3.8 and found that math.dist() was a little restrictive in only accepting coordinates as tuples. Mostly it worked out fine except but was a little inconvenient with generalized unpacking:

label, *coordinates = cursor.fetchone() # coordinates is a list

Also, it would be nice to allow numpy arrays as arguments.

[rhettinger]

New changeset 6b5f1b4 by Raymond Hettinger in branch 'master':
bpo-37691: Let math.dist() accept sequences and iterables for coordinates (GH-14975)
6b5f1b4

[rhettinger]

New changeset 76821ba by Raymond Hettinger (Miss Islington (bot)) in branch '3.8':
bpo-37691: Let math.dist() accept sequences and iterables for coordinates (GH-14975) (GH-14984)
76821ba