[Django] #28961: Convert result of the predicate in the function django.utils.functional.partition to bool

[Django]

#28961: Convert result of the predicate in the function
django.utils.functional.partition to bool
-------------------------------------+-------------------------------------
Reporter: Vitaliy | Owner: nobody
Type: | Status: new
Cleanup/optimization |
Component: Utilities | Version: 1.11
Severity: Normal | Keywords: functional
Triage Stage: | partition
Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
-------------------------------------+-------------------------------------
{{{#!python
def partition(predicate, values):
results = ([], [])
for item in values:
results[bool(predicate(item))].append(item)
return results
}}}

This will make the `partition` function more convenient
{{{#!python
>>> def idf(x): return x
>>> partition(idf, [True, False, '', 1, 2])
([False, ''], [True, 1, 2])
}}}

or make the behaviour of the function more similar to
[https://hackage.haskell.org/package/base-4.10.1.0/docs/Data-
List.html#v:partition `Haskell partition`]

The partition function takes a predicate a list and returns the pair
of lists of elements which do and do not satisfy the predicate,
respectively

{{{#!python
def partition(predicate, values):
results = ([], [])
for item in values:
results[not predicate(item)].append(item)
return results

>>> def idf(x): return x
>>> partition(idf, [True, False, '', 1, 2])
([True, 1, 2], [False, ''])
}}}

--
Ticket URL: <https://code.djangoproject.com/ticket/28961>
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[Django]

#28961: Convert result of predicate in the function

django.utils.functional.partition to bool
-------------------------------------+-------------------------------------
Reporter: Vitaliy | Owner: nobody
Type: | Status: new
Cleanup/optimization |
Component: Utilities | Version: 1.11

Severity: Normal | Resolution:

Keywords: functional | Triage Stage:
partition | Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------

--
Ticket URL: <https://code.djangoproject.com/ticket/28961#comment:1>

[Django]

#28961: Convert result of predicate in the function

django.utils.functional.partition to bool
-------------------------------------+-------------------------------------
Reporter: Vitaliy | Owner: nobody

Type: | Status: closed

Cleanup/optimization |
Component: Utilities | Version: 1.11

Severity: Normal | Resolution: wontfix

Keywords: functional | Triage Stage:
partition | Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------

Changes (by Tim Graham):

* status: new => closed
* resolution: => wontfix

Comment:

`partition()` isn't a documented function and I don't see a strong reason
to add logic to it that Django's usage doesn't require.

--
Ticket URL: <https://code.djangoproject.com/ticket/28961#comment:2>