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Explicit method overriding with @typing.override
https://rednafi.com/python/typing-override/ · 6 Nov 2024
Catch method override errors at type-check time with Python's @override decorator from PEP 698, preventing typos and signature mismatches.
python til typing
TypeIs does what I thought TypeGuard would do in Python
https://rednafi.com/python/typeguard-vs-typeis/ · 27 Apr 2024
Understand TypeIs vs TypeGuard in Python: TypeIs provides more intuitive type narrowing by narrowing both positive and negative branches.
python typing til
Annotating args and kwargs in Python
https://rednafi.com/python/annotate-args-and-kwargs/ · 8 Jan 2024
Properly annotate Python *args and **kwargs with heterogeneous types using Unpack, TypedDict, and modern type hints from PEP-692.
python typing til
Statically enforcing frozen data classes in Python
https://rednafi.com/python/statically-enforcing-frozen-dataclasses/ · 4 Jan 2024
Enforce immutable dataclasses at type-check time with @final decorator to catch mutations before runtime without frozen=True performance cost.
python til typing
Guard clause and exhaustiveness checking
https://rednafi.com/typescript/guard-clauses-and-never-type/ · 22 May 2022
Master TypeScript's never type and Python's NoReturn for exhaustiveness checking. Flatten nested conditionals with guard clauses for cleaner code.
typescript python typing
Declarative payloads with TypedDict in Python
https://rednafi.com/python/declarative-payloads-with-typedict/ · 11 Mar 2022
Use Python TypedDict to declaratively define API payload structures. Get type safety for nested dictionaries and improve code maintainability.
python typing api
Self type in Python
https://rednafi.com/python/self-type/ · 28 Feb 2022
Use Python's Self type from PEP 673 to annotate methods returning class instances, eliminating complex forward references and TypeVars.
python typing
Narrowing types with TypeGuard in Python
https://rednafi.com/python/type-guard/ · 23 Feb 2022
Use Python's TypeGuard to create custom type narrowing functions that help static type checkers understand runtime type checks and validations.
python typing
Why 'NoReturn' type exists in Python
https://rednafi.com/python/why-noreturn-type-exists/ · 21 Feb 2022
Use Python's NoReturn type to annotate functions that never return normally, helping type checkers understand exception-raising and infinite loop code.
python typing
Go Rusty with exception handling in Python
https://rednafi.com/python/go-rusty-with-exception-handling/ · 2 Feb 2022
Implement Rust-style Result types for type-safe exception handling in Python using generic Ok and Err types inspired by Black formatter.
python error handling typing
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