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bpo-34083: Update dict order in Functional HOWTO (GH-8230) 

(cherry picked from commit 5e5bbbec46)

Co-authored-by: Stig Johan Berggren <stigjb@gmail.com>
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Miss Islington (bot) 2018-07-11 04:21:52 -07:00 committed by GitHub
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Doc/howto/functional.rst
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@ -273,23 +273,24 @@ dictionary's keys::
>>> m = {'Jan': 1, 'Feb': 2, 'Mar': 3, 'Apr': 4, 'May': 5, 'Jun': 6, >>> m = {'Jan': 1, 'Feb': 2, 'Mar': 3, 'Apr': 4, 'May': 5, 'Jun': 6,
... 'Jul': 7, 'Aug': 8, 'Sep': 9, 'Oct': 10, 'Nov': 11, 'Dec': 12} ... 'Jul': 7, 'Aug': 8, 'Sep': 9, 'Oct': 10, 'Nov': 11, 'Dec': 12}
>>> for key in m: #doctest: +SKIP >>> for key in m:
... print(key, m[key]) ... print(key, m[key])
Mar 3 Jan 1
Feb 2 Feb 2
Aug 8 Mar 3
Sep 9
Apr 4 Apr 4
May 5
Jun 6 Jun 6
Jul 7 Jul 7
Jan 1 Aug 8
May 5 Sep 9
Oct 10
Nov 11 Nov 11
Dec 12 Dec 12
Oct 10
Note that the order is essentially random, because it's based on the hash Note that starting with Python 3.7, dictionary iteration order is guaranteed
ordering of the objects in the dictionary. to be the same as the insertion order. In earlier versions, the behaviour was
unspecified and could vary between implementations.
Applying :func:`iter` to a dictionary always loops over the keys, but Applying :func:`iter` to a dictionary always loops over the keys, but
dictionaries have methods that return other iterators. If you want to iterate dictionaries have methods that return other iterators. If you want to iterate
@ -301,8 +302,8 @@ The :func:`dict` constructor can accept an iterator that returns a finite stream
of ``(key, value)`` tuples: of ``(key, value)`` tuples:
>>> L = [('Italy', 'Rome'), ('France', 'Paris'), ('US', 'Washington DC')] >>> L = [('Italy', 'Rome'), ('France', 'Paris'), ('US', 'Washington DC')]
>>> dict(iter(L)) #doctest: +SKIP >>> dict(iter(L))
{'Italy': 'Rome', 'US': 'Washington DC', 'France': 'Paris'} {'Italy': 'Rome', 'France': 'Paris', 'US': 'Washington DC'}
Files also support iteration by calling the :meth:`~io.TextIOBase.readline` Files also support iteration by calling the :meth:`~io.TextIOBase.readline`
method until there are no more lines in the file. This means you can read each method until there are no more lines in the file. This means you can read each