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Classes created using type() don't need to explicitly inherit from object #84484

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verhovsky mannequin opened this issue Apr 16, 2020 · 4 comments
Closed

Classes created using type() don't need to explicitly inherit from object #84484

verhovsky mannequin opened this issue Apr 16, 2020 · 4 comments
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3.9 only security fixes docs Documentation in the Doc dir type-feature A feature request or enhancement

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@verhovsky
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Mannequin

verhovsky mannequin commented Apr 16, 2020

BPO 40304
Nosy @terryjreedy, @miss-islington, @verhovsky
PRs
  • bpo-40304: Correct type(name, bases, dict) doc #19553
  • [3.9] bpo-40304: Correct type(name, bases, dict) doc (GH-19553) #24295
  • [3.8] bpo-40304: Correct type(name, bases, dict) doc (GH-19553) #24296
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    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 2021-01-22.06:12:48.539>
created_at = <Date 2020-04-16.17:31:50.057>
labels = ['type-feature', '3.9', 'docs']
title = "Classes created using type() don't need to explicitly inherit from object"
updated_at = <Date 2021-01-22.06:12:48.538>
user = 'https://github.com/verhovsky'

    bugs.python.org fields:

    activity = <Date 2021-01-22.06:12:48.538>
actor = 'terry.reedy'
assignee = 'docs@python'
closed = True
closed_date = <Date 2021-01-22.06:12:48.539>
closer = 'terry.reedy'
components = ['Documentation']
creation = <Date 2020-04-16.17:31:50.057>
creator = 'boris'
dependencies = []
files = []
hgrepos = []
issue_num = 40304
keywords = ['patch']
message_count = 4.0
messages = ['366613', '385478', '385479', '385480']
nosy_count = 4.0
nosy_names = ['terry.reedy', 'docs@python', 'miss-islington', 'boris']
pr_nums = ['19553', '24295', '24296']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue40304'
versions = ['Python 3.9']
    @verhovsky
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    verhovsky mannequin commented Apr 16, 2020

    As far as I can tell, passing (object,) and () as the bases parameter to the 3-argument version of type() produces the same result, because classes inherit from object in Python 3:

    >>> type('X', (object,), dict(a=1)).__bases__
(<class 'object'>,)
>>> type('X', (), dict(a=1)).__bases__
(<class 'object'>,)

    I just want to make sure I'm not missing something and update the documentation of type() to reflect that.

    @verhovsky verhovsky mannequin added the 3.9 only security fixes label Apr 16, 2020
    @verhovsky verhovsky mannequin assigned docspython Apr 16, 2020
    @verhovsky verhovsky mannequin added docs Documentation in the Doc dir type-feature A feature request or enhancement 3.9 only security fixes labels Apr 16, 2020
    @verhovsky verhovsky mannequin assigned docspython Apr 16, 2020
    @verhovsky verhovsky mannequin added docs Documentation in the Doc dir type-feature A feature request or enhancement labels Apr 16, 2020
    @terryjreedy
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    New changeset 644d528 by Борис Верховский in branch 'master':
    bpo-40304: Correct type(name, bases, dict) doc (GH-19553)
    644d528

    @miss-islington
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    New changeset 34f3f4a by Miss Islington (bot) in branch '3.8':
    bpo-40304: Correct type(name, bases, dict) doc (GH-19553)
    34f3f4a

    @miss-islington
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    New changeset 98e1f5c by Miss Islington (bot) in branch '3.9':
    bpo-40304: Correct type(name, bases, dict) doc (GH-19553)
    98e1f5c

    @ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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