dry-python/returns 0.12.0

Version 0.12.0

on GitHub

Features

• Breaking: now @pipeline requires a container type when created:
  @pipeline(Result) or @pipeline(Maybe)
• Maybe and Result now has success_type and failure_type aliases
• Adds Result.unify utility method for better error type composition
• We now support dry-python/classes as a first-class citizen
• Adds io_squash to squash several IO containers into one container
  with a tuple inside, currently works with 9 containers max at a time
• Adds untap function which does convert return type to None

Bugfixes

• Fixes that containers were not usable with multiprocessing
• Changes the inheritance order, now BaseContainer is the first child
• Fixes that Nothing had incorrect docstrings

Misc

• Now generated package is protected
• Updates poetry to 1.0