[issue40319] dict.update() return the updated dict instead of None

[SilentGhost]

SilentGhost  added the comment:

This looks like a proposed "enhancement" rather than a bug report. 
Unfortunately, this is not possible for a myriad of reasons, from backward 
compatibility to overall use of mutating methods in Python.

--
nosy: +SilentGhost
resolution:  -> rejected
stage:  -> resolved
status: open -> closed

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[issue40319] dict.update() return the updated dict instead of None

[Dong-hee Na]

Dong-hee Na  added the comment:

Python 3.8.2+ (heads/3.8:c496e29c2b, Apr 18 2020, 21:42:41)
[Clang 11.0.3 (clang-1103.0.32.29)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> a = {"test": 1}
>>> b = {"type": 2}
>>> c = a.update(b)
>>> print(c)
None

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[issue40319] dict.update() return the updated dict instead of None

[Dong-hee Na]

Dong-hee Na  added the comment:

Python 3.9.0a5+ (heads/master:c606624af8, Apr 18 2020, 18:42:51)
[Clang 11.0.3 (clang-1103.0.32.29)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> a = {"test": 1}
>>> b = {"type": 2}
>>> c = a.update(b)
>>> print(c)
None

on macOS master branch, the issue is not reproducible.

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nosy: +corona10

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[issue40319] dict.update() return the updated dict instead of None

[Karthikeyan Singaravelan]

Karthikeyan Singaravelan  added the comment:

Can you please print the output of python -v? Using python 3.8.0 on Linux 
returns None for update method.

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[issue40319] dict.update() return the updated dict instead of None

[Karthikeyan Singaravelan]

Change by Karthikeyan Singaravelan :


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nosy: +xtreak

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[issue40319] dict.update() return the updated dict instead of None

[AL3X_69]

New submission from AL3X_69 :

When a dict is updated with update(), instead of return None, it will return 
the updated dict.

example: 

>>> a = {"test": 1}
>>> b = {"type": 2}
>>> c = a.update(b)
>>> print(c)
{"test": 1, "type": 1}

--
messages: 366703
nosy: AL3X_69
priority: normal
severity: normal
status: open
title: dict.update() return the updated dict instead of None
type: enhancement
versions: Python 3.8

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