Enhance for loop and copy example in tutorial

[JulienPalard]

BPO	40552
Nosy	@JulienPalard, @nanjekyejoannah, @awecx
PRs	bpo-40552 Add 'users' variable in code sample (tutorial 4.2). #19992

^{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 = <Date 2020-05-23.00:34:08.948>
created_at = <Date 2020-05-07.20:48:23.906>
labels = ['easy', 'type-feature', 'docs']
title = 'Enhance for loop and copy example in tutorial'
updated_at = <Date 2020-05-23.00:34:08.947>
user = 'https://github.com/JulienPalard'

bugs.python.org fields:

activity = <Date 2020-05-23.00:34:08.947>
actor = 'nanjekyejoannah'
assignee = 'docs@python'
closed = True
closed_date = <Date 2020-05-23.00:34:08.948>
closer = 'nanjekyejoannah'
components = ['Documentation']
creation = <Date 2020-05-07.20:48:23.906>
creator = 'mdk'
dependencies = []
files = []
hgrepos = []
issue_num = 40552
keywords = ['patch', 'easy']
message_count = 4.0
messages = ['368373', '368431', '369674', '369677']
nosy_count = 4.0
nosy_names = ['docs@python', 'mdk', 'nanjekyejoannah', 'awecx']
pr_nums = ['19992']
priority = 'low'
resolution = None
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue40552'
versions = []

[JulienPalard]

During the past few weeks we got two reports of an example not working in the tutorial: 1, 2.

Problem is: the example uses a users variable that is not defined.

users should be a dict, which is not straightforward for newcomers neither, so I propose to define it to:

    users = {"Hans": "active", "Andrea": "inactive", "Nils": "active"}

in the example, to make it work.

[awecx]

I've issued #19992.

I've changed the names mdk suggested to give an example of using non-ascii characters.

[nanjekyejoannah]

New changeset 6fad3e6 by Antoine in branch 'master':
bpo-40552 Add 'users' variable in code sample (tutorial 4.2). (GH-19992)
6fad3e6

[nanjekyejoannah]

Thanks for the PR Antoine Wecxsteen. I will close this.