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Changelog

This project follows semantic versioning.

Possible log types:

  • [added] for new features.
  • [changed] for changes in existing functionality.
  • [deprecated] for once-stable features removed in upcoming releases.
  • [removed] for deprecated features removed in this release.
  • [fixed] for any bug fixes.
  • [security] to invite users to upgrade in case of vulnerabilities.

Unreleased

0.16.1 - 2024-02-29

  • [fixed] PyPI not showing description (#176)

0.16.0 - 2023-12-23

  • [added] Add map_async for async functions (#165)
  • [fixed] Add do_async() to handle edge case in do() involving multiple inlined awaits (#149)
  • [added] Add support for Python 3.12 (#157)

0.15.0 - 2023-12-04

  • [added] Add do function to support Haskell-style do-notation (#149)

0.14.0 - 2023-11-10

  • [added] is_ok and is_err type guard functions as alternatives to isinstance checks (#69)
  • [added] Add and_then_async for async functions (#148)

0.13.1 - 2023-07-19

  • [fixed] Use self._value instead of deprecated self.value in Err.expect and Err.unwrap to avoid raising a warning (#133)

0.13.0 - 2023-07-15

  • [changed] Include captured Err value when expect and unwrap are called and an UnwrapError is raised (#98, #132)

0.12.0 - 2023-06-11

  • [removed] Drop support for Python 3.7 (#126)
  • [fixed] Pattern matching deprecation warning (#128)
  • [changed] Minor internal implementation details (#129, #130)

0.11.0 - 2023-06-11

  • [changed] Ok now requires an explicit value during instantiation. Please check out MIGRATING.md, it will guide you through the necessary change in your codebase.
  • [deprecated] value property to access the inner value (#37, #121)
  • [added] ok_value and err_value to access the inner value more safely (#37, #121)

0.10.0 - 2023-04-29

  • [fixed] Make python version check PEP 484 compliant (#118)
  • [added] as_async_result decorator to turn regular async functions into Result returning ones (#116)

0.9.0 - 2022-12-09

  • [added] Implement unwrap_or_raise (#95)
  • [added] Add support for Python 3.11 (#107)
  • [changed] Narrowing of return types on methods of Err and Ok. (#106)
  • [fixed] Fix failing type inference for Result.map and similar method unions (#106)

0.8.0 - 2022-04-17

  • [added] as_result decorator to turn regular functions into Result returning ones (#33, 71)
  • [removed] Drop support for Python 3.6 (#49)
  • [added] Implement unwrap_or_else (#74), and_then (#90) and or_else (#90)

0.7.0 - 2021-11-19

  • [removed] Drop support for Python 3.5 (#34)
  • [added] Add support for Python 3.9 and 3.10 (#50)
  • [changed] Make the Ok type covariant in regard to its wrapped type T. Likewise for Err in regard to E. This should result in more intuitive type checking behaviour. For instance, Err[TypeError] will get recognized as a subtype of Err[Exception] by type checkers. See PEP 438 for a detailed explanation of covariance and its implications.
  • [added] Add support for Python 3.10 pattern matching (#47)
  • [changed] Ok and Err now define __slots__ to save memory (#55, #58)
  • [changed] The generic type of UnwrapError.result now explicitly specifies Any (#67)

0.6.0 - 2021-03-17

IMPORTANT: This release a big API refactoring to make the API more type safe. Unfortunately this means some breaking changes. Please check out MIGRATING.md, it will guide you through the necessary changes in your codebase.

  • [changed] Split result type into Ok and Err classes (#17, #27)
  • [deprecated] Python 3.4 support is deprecated and will be removed in the next release

0.5.0 - 2020-03-03

  • [added] Implement map, map_err, map_or and map_or_else (#19)
  • [added] Add unwrap_err and expect_err methods (#26)
  • [changed] Type annotations: Change parameter order from Result[E, T] to Result[T, E] to match Rust/OCaml/F# (#7)

0.4.1 - 2020-02-17

  • [added] Add py.typed for PEP561 package compliance (#16)

0.4.0 - 2019-04-17

  • [added] Add unwrap, unwrap_or and expect (#9)
  • [removed] Drop support for Python 2 and 3.3
  • [changed] Only install typing dependency for Python <3.5

0.3.0 - 2017-07-12

  • [added] This library is now fully type annotated (#4, thanks @tyehle)
  • [added] Implementations for __ne__, __hash__ and __repr__
  • [deprecated] Python 2 support is deprecated and will be removed in the 0.4 release

0.2.2 - 2016-09-21

  • [added] __eq__ magic method

0.2.0 - 2016-05-05

  • [added] Convenience default: Ok() == Ok(True)

0.1.1 - 2015-12-14

  • [fixed] Import bugfix

0.1.0 - 2015-12-14

  • Initial version