Dataclasses practice problems in Python

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Showing 33 of 33

Title	Difficulty	Category
Accidental quadratics: an index-backed join and a streaming top-k	Medium	End-to-End
A registry that does not prevent collection	Medium	Primitives
asdict() and astuple(): the deep-copy tax	Hard	Framework
A typed factory fixture	Hard	Primitives
Capstone: an immutable domain model that survives review	Hard	End-to-End
Class patterns, __match_args__ and an expression simplifier	Medium	End-to-End
ClassVar, field(), and the counter that must reset	Easy	Primitives
Converters and validate-on-assignment: what attrs buys you	Medium	Primitives
Dataclasses: slots, frozen, order	Easy	Primitives
@dataclass is a code generator: what it emits	Easy	Primitives
dataclass_transform (PEP 681): making your own decorator type-checkable	Hard	Framework
Does this version satisfy this specifier?	Medium	Primitives
eq, hash, and the eq/frozen/unsafe_hash truth table	Hard	Framework
field(): the seven knobs that change generated behaviour	Medium	Primitives
frozen=True: what it buys, what it costs, and what it does not do	Medium	Primitives
Generic dataclasses, Self, and the covariance question	Hard	Framework
Graceful Shutdown of a Process Pool	Hard	End-to-End
Guards, OR patterns, AS patterns and the binding rules	Medium	End-to-End
heapq: a priority queue that is FIFO among equal priorities	Medium	Primitives
Identity vs equality: fix the planted `is`	Easy	Primitives
kw_only, KW_ONLY and the inheritance ordering wall	Medium	Primitives
order=True, the 3.13 __eq__ change, and orderings that are not tuples	Hard	Primitives
Parse at the boundary, dataclasses in the core	Hard	End-to-End
Parse, don't validate: the boundary returns a narrower type	Medium	End-to-End
__post_init__ and InitVar: parameters that are consumed, not stored	Medium	Primitives
replace(), copy.replace(), and the mypy gap between them	Hard	Framework
Runtime introspection after PEP 649: Field.type is not a type	Hard	Framework
Serializing dataclasses properly: round-trips, paths and schema versions	Hard	End-to-End
__slots__, part 2: the eight things it breaks	Hard	Framework
The configuration boundary in practice: file, environment, argv, one Config	Medium	End-to-End
The mutable-default trap — and why the guard is weaker than you think	Easy	Primitives
Typed settings: parse the environment once, report every problem	Medium	End-to-End
Writing generic code over dataclasses under --strict	Hard	Framework