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"Either" and "Maybe" data structures

Project description

https://github.com/kennknowles/python-either

This library provides two fundamental near-trivial data structures for Python:

  • Either also known as “coproduct”, “sum type”, “variant”, “tagged union”, “disjoint union”, etc: A value that comes from one of two sets
  • Maybe also known as “option” or “Either Nothing”: A value that may be missing. (Python has “None” but it does not compose)

Each is ~10 lines, mostly boilerplate, but now they are in one place in a library.

Further Reading:

If you are unfamiliar with these concepts, here is some reading from around the web:

Either:

Maybe:

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