The dataclasses documentation should mention how to call super().__init__

[ericvsmith]

BPO	43558
Nosy	@ericvsmith, @corona10, @miss-islington, @JunyiXie, @dhoekstra2000
PRs	bpo-43558: Add base class initialization to dataclass doc #25967 [3.10] bpo-43558: Add note about base class initialization to dataclasses doc (GH-25967) #26018 [3.9] bpo-43558: Add note about base class initialization to dataclasses doc (GH-25967) #26019

^{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 2021-05-10.13:39:25.123>
created_at = <Date 2021-03-19.14:47:18.001>
labels = ['easy', '3.8', '3.9', '3.10', 'docs']
title = 'The dataclasses documentation should mention how to call super().__init__'
updated_at = <Date 2021-05-10.13:39:25.122>
user = 'https://github.com/ericvsmith'

bugs.python.org fields:

activity = <Date 2021-05-10.13:39:25.122>
actor = 'eric.smith'
assignee = 'none'
closed = True
closed_date = <Date 2021-05-10.13:39:25.123>
closer = 'eric.smith'
components = ['Documentation']
creation = <Date 2021-03-19.14:47:18.001>
creator = 'eric.smith'
dependencies = []
files = []
hgrepos = []
issue_num = 43558
keywords = ['patch', 'easy', 'newcomer friendly']
message_count = 6.0
messages = ['389097', '393114', '393115', '393391', '393392', '393393']
nosy_count = 5.0
nosy_names = ['eric.smith', 'corona10', 'miss-islington', 'JunyiXie', 'dhoekstra']
pr_nums = ['25967', '26018', '26019']
priority = 'low'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue43558'
versions = ['Python 3.8', 'Python 3.9', 'Python 3.10']

[ericvsmith]

https://docs.python.org/3/library/dataclasses.html#post-init-processing should mention that if you need to call super().__init__, you should do it in __post_init__. Dataclasses cannot know what parameters to pass to the super class's __init__, so you'll need to do it yourself manually in __post_init__.

[dhoekstra2000]

I'd like to fix this. Since this would be my first contribution ever, I will need some time to figure out procedures and style requirements regarding documentation. I estimate this will take me no longer than 3 days.

[ericvsmith]

Sure. Take your time! Thank you in advance for your contribution.

[ericvsmith]

New changeset 4d532d3 by Miss Islington (bot) in branch '3.9':
bpo-43558: Add note about base class initialization to dataclasses doc (GH-25967) (GH-26019)
4d532d3

[ericvsmith]

New changeset f47305a by Miss Islington (bot) in branch '3.10':
bpo-43558: Add note about base class initialization to dataclasses doc (GH-25967) (GH-26018)
f47305a

[ericvsmith]

Thanks, @dhoekstra!