Version 0.9.0

Features

• Provides a bunch of primitive interfaces to write your own containers
• Adds .map_failure() method
• Adds join() function to join nested containers

Bugfixes

• Fixes type of Maybe.fix and Maybe.rescue to work with both lambda: 1 and lambda _: 1

Misc

• Improves README

Version 0.8.0

Features

• Reintroduces the Maybe monad, typed!
• Introduces converters from one type to another
• Adds mypy plugin to type decorators
• Complete rewrite of Result types
• Partial API change, now Success and Failure are not types, but functions
• New internal types introduced: FixableContainer and ValueUnwrapContainer

Bugfixes

• Fixes issue when you could return IO container from Result.bind
• Fixes @pipeline return type

Misc

• Reapplied all types to .py files
• Improved docs about IO and Container concept
• Adds docs about container composition
• Moves from Alpha to Beta

Version 0.7.0

Features

• Adds IO marker
• Adds unsafe module with unsafe functions
• Changes how functions are located inside the project

Bugfixes

• Fixes container type in @pipeline
• Now is_successful is public
• Now raise_exception is public

Misc

• Changes how str() function works for container types
• Total rename to "container" in the source code

Version 0.6.0

Features

• safe and pipeline now supports asyncio
• is_successful now returns Literal types if possible

Version 0.5.0

Features

• Adds compose helper function
• Adds public API to import returns
• Adds raise_exception helper function
• Adds full traceback to .unwrap()

Misc

• Updates multiple dev-dependencies, including mypy
• Now search in the docs is working again
• Relicenses this project to BSD
• Fixes copyright notice in the docs

Version 0.4.0 aka Goodbye, Monads!

Features

• Moves all types to .pyi files
• Renames all classes according to new naming pattern
• HUGE improvement of types
• Renames fmap to map
• Renames do_notation to pipeline, moves it to functions.py
• Renames ebind to rescue
• Renames efmap to fix
• Renames Monad to Container
• Removes Maybe monad, since typing does not have NonNullable type

Version 0.3.1

Bugfixes

• Adds py.typed file to be PEP561 compatible

Version 0.3.0

The project is renamed to returns and moved to dry-python org.

Features

• Adds .pyi files for all modules,
  to enable mypy support for 3rd party users

Version 0.2.0

Features

• Adds Maybe monad
• Adds immutability and __slots__ to all monads
• Adds methods to work with failures
• Adds safe decorator to convert exceptions to Either monad
• Adds is_successful() function to detect if your result is a success
• Adds failure() method to unwrap values from failed monads

Bugfixes

• Changes the type of .bind method for Success monad
• Changes how equality works, so now Failure(1) != Success(1)
• Changes how new instances created on unused methods

Misc

• Improves docs

Version 0.1.1

Bugfixes

• Changes how PyPI renders package's page

Misc

• Improves README with new badges and installation steps