python-attrs/attrs

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Python Classes Without Boilerplate

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Forks: 480
Open beginner issues: 0
Indexed issues: 134
Avg merge: 2h 15m
Merged PRs (30d): 2

Dominant language: Python
License: MIT
Last GitHub push: Sep 1, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
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134 open issues indexed

Class helper functions - Support for generic classes Open

Typing

Difficulty 4/5 3-5 days Newbie friendliness 45/100

python-attrs/attrs#1049 · 3 comments · 1 reaction · Opened Nov 3, 2022
Reference cycle for slot classes Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

python-attrs/attrs#1047 · 13 comments · Opened Oct 31, 2022
TypeError when calling super() in decorated method Open

Bug

Difficulty 3/5 1-2 days Newbie friendliness 65/100

python-attrs/attrs#1038 · 7 comments · 1 reaction · Opened Oct 6, 2022
Inheritance breaks mypy type checking with optional attributes if Generics are involved Open

Waiting for Mypy

Difficulty 4/5 3-5 days Newbie friendliness 35/100

python-attrs/attrs#1028 · 8 comments · Opened Sep 19, 2022
Typing not working properly when positional argument is defined in subclass with redefined kwargs Open

Typing

Difficulty 4/5 3-5 days Newbie friendliness 30/100

python-attrs/attrs#1023 · 4 comments · Opened Sep 7, 2022
`typing.get_type_hints` cannot resolve forward references in `cls.__init__` annotations Open

Typing

Difficulty 4/5 3-5 days Newbie friendliness 35/100

python-attrs/attrs#1021 · 1 comment · Opened Sep 5, 2022
Mixed inheritance between slotted and non slotted classes leads to issues with parallelisation. Open

Documentation Thinking

Difficulty 4/5 3-5 days Newbie friendliness 35/100

python-attrs/attrs#1020 · 14 comments · Opened Aug 23, 2022
Abstract property can't be found by mixins when property is a `attr.ib` Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

python-attrs/attrs#1000 · 13 comments · Opened Aug 10, 2022
Use of `AttrsInstance` protocol is incompatible with type checkers other than mypy Open

Typing

Difficulty 5/5 Over a week Newbie friendliness 32/100

python-attrs/attrs#996 · 8 comments · Opened Aug 8, 2022
Support abstract functionality for attrs classes Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-attrs/attrs#976 · 5 comments · Opened Jun 29, 2022
Suggestion: When eq=Callable, make __hash__ use the return value of the callable. Open

Feature

Difficulty 4/5 3-5 days Newbie friendliness 42/100

python-attrs/attrs#975 · Opened Jun 28, 2022
Add support for accessing the instance in converters Open

Feature

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-attrs/attrs#959 · 1 comment · Opened May 10, 2022
Inherit annotation type from base class that defines new default value Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

python-attrs/attrs#946 · 1 comment · Opened Apr 4, 2022
Brainstorming `fields()` Open

Thinking

Difficulty 5/5 Over a week Newbie friendliness 20/100

python-attrs/attrs#934 · 1 comment · Opened Mar 17, 2022
API semantics for deep nested evolve calls Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-attrs/attrs#932 · 8 comments · Opened Mar 15, 2022
Allow custom hashing function in `_make_hash` Open

Feature Thinking

Difficulty 4/5 3-5 days Newbie friendliness 25/100

python-attrs/attrs#926 · 4 comments · Opened Mar 4, 2022
Mypy error "Cannot determine __init__ type from converter" when using type checking, overloads and converters Open

Typing

python-attrs/attrs#897 · 3 comments · 1 assignee · Opened Dec 29, 2021
mypy returns "Incompatible types in assignment" with on_setattr=setters.convert Open

Typing

Difficulty 4/5 3-5 days Newbie friendliness 45/100

python-attrs/attrs#889 · 3 comments · Opened Dec 16, 2021
Why descriptor don't work with attr? Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

python-attrs/attrs#881 · 13 comments · Opened Dec 6, 2021
Question: `make_class` equivalent of the "new API" - defining fields using type annotations Open

Feature

Difficulty 3/5 1-2 days Newbie friendliness 25/100

python-attrs/attrs#869 · 1 comment · 3 reactions · Opened Nov 21, 2021
asdict filter exclude list matches on name instead of attribute Open

Bug

Difficulty 3/5 1-2 days Newbie friendliness 38/100

python-attrs/attrs#864 · 4 comments · Opened Nov 12, 2021
Provide a builtin validator that takes a boolean function. Open

Feature

Difficulty 3/5 1-2 days Newbie friendliness 35/100

python-attrs/attrs#832 · 9 comments · 3 reactions · Opened Jul 13, 2021
Typing of `optional` validator fails Open

Bug Typing

Difficulty 3/5 1-2 days Newbie friendliness 38/100

python-attrs/attrs#799 · 2 comments · Opened May 4, 2021
pyright support via dataclass transforms Open

Feature Typing

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-attrs/attrs#795 · 27 comments · 4 reactions · Opened Apr 23, 2021
Type annotation for attr.ib wrappers functions Open

Bug Typing

Difficulty 4/5 3-5 days Newbie friendliness 35/100

python-attrs/attrs#779 · 8 comments · 2 reactions · Opened Mar 11, 2021
Using Annotated in attrs Open

Feature On Hold Thinking

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-attrs/attrs#775 · 11 comments · 4 reactions · Opened Mar 8, 2021
Subclassed decorator methods not working Open

Documentation

Difficulty 4/5 3-5 days Newbie friendliness 35/100

python-attrs/attrs#753 · 6 comments · Opened Jan 28, 2021
[RFC] A shortcut to define a classvar with the same name as an attribute Open

Feature

Difficulty 5/5 Over a week Newbie friendliness 20/100

python-attrs/attrs#746 · 4 comments · 1 reaction · Opened Jan 7, 2021
Missing recursion detection in attr.asdict Open

Thinking

Difficulty 5/5 Over a week Newbie friendliness 35/100

python-attrs/attrs#740 · 8 comments · 1 reaction · Opened Dec 22, 2020
Support for a validator argument to enable runtime validation Open

Feature

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-attrs/attrs#739 · 3 comments · 2 reactions · Opened Dec 21, 2020
pickling of Exceptions and kw_only Open

Bug Fly paper

Difficulty 4/5 3-5 days Newbie friendliness 38/100

python-attrs/attrs#734 · 10 comments · Opened Dec 16, 2020
Typing: include field type in Attribute type signature Open

Typing

Difficulty 4/5 3-5 days Newbie friendliness 38/100

python-attrs/attrs#729 · 13 comments · Opened Dec 7, 2020
attr.validate() is not recursive Open

Feature

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-attrs/attrs#727 · 1 comment · Opened Dec 2, 2020
instance_of validator cannot refer to the current class Open

Feature

Difficulty 4/5 3-5 days Newbie friendliness 35/100

python-attrs/attrs#722 · 3 comments · Opened Nov 28, 2020
Initialization order of fields overridden in subclasses Open

Typing

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-attrs/attrs#707 · 9 comments · Opened Oct 23, 2020
attr.Factory provided with the attribute beeing initialized Open

Feature

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-attrs/attrs#692 · 6 comments · Opened Sep 23, 2020
PEP 557 interop namespace Open

Feature

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-attrs/attrs#686 · 4 comments · Opened Sep 3, 2020
asdict and astuple raise exceptions on instances with uninitialized attributes Open

Feature

Difficulty 3/5 1-2 days Newbie friendliness 38/100

python-attrs/attrs#677 · 2 comments · Opened Aug 24, 2020
on_setattr doesn't apply during init Open

Documentation

Difficulty 5/5 Over a week Newbie friendliness 20/100

python-attrs/attrs#672 · 3 comments · 3 reactions · Opened Aug 21, 2020
Expand allowed types for converters Open

Feature

Difficulty 4/5 3-5 days Newbie friendliness 35/100

python-attrs/attrs#662 · 2 comments · Opened Aug 3, 2020
Handling of None when assigned to non-optional attribute Open

Feature

Difficulty 5/5 Over a week Newbie friendliness 35/100

python-attrs/attrs#655 · 10 comments · Opened Jun 26, 2020
Create validators not tied to attributes Open

Feature

Difficulty 5/5 Over a week Newbie friendliness 35/100

python-attrs/attrs#647 · 5 comments · Opened May 22, 2020
Order of attributes in a attr.s class is dependent upon the order the attributes were created Open

Bug

Difficulty 3/5 1-2 days Newbie friendliness 35/100

python-attrs/attrs#643 · 2 comments · Opened May 1, 2020
Add positional-only parameters Open

Feature

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-attrs/attrs#641 · 3 comments · 2 reactions · Opened Apr 26, 2020
Option to "partially override" an attribute from a parent class? Open

Feature

Difficulty 5/5 Over a week Newbie friendliness 25/100

python-attrs/attrs#637 · 21 comments · 6 reactions · Opened Apr 6, 2020
Recursive attr.evolve Open

Feature

python-attrs/attrs#634 · 9 comments · 1 reaction · 1 assignee · Opened Mar 25, 2020
Passing `these=d` to `attr.s` skips attributes defined in class body Open

Bug

Difficulty 4/5 3-5 days Newbie friendliness 58/100

python-attrs/attrs#621 · 3 comments · Opened Jan 28, 2020
attr.ibs that will be __name-mangled should be attrs-init-mangled to <name> not ClassName_<name> Open

Bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

python-attrs/attrs#619 · 5 comments · Opened Jan 27, 2020
Type checking unexpectedly passing when misusing `default` and `converter` Open

Bug Typing

Difficulty 4/5 3-5 days Newbie friendliness 25/100

python-attrs/attrs#604 · 4 comments · Opened Dec 27, 2019
No mention of how to use eq/order in narrative docs Open

Documentation

Difficulty 3/5 1-2 days Newbie friendliness 45/100

python-attrs/attrs#598 · 5 comments · Opened Nov 12, 2019

python-attrs/attrs

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