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For Python (as a library, not a core language construct): https://github.com/radix/sumtypes/ https://github.com/radix/sumtypes/ (Same year - 2015 - as the ori

• fphilipe 9y ago
  If you're looking for a simple sum type without associated value, the standard library's enum works quite well: https://docs.python.org/3/library/enum.html https://docs.python.org/3/library/enum.html
• philpee2 9y ago
  If you're using mypy, there's also the Union type https://mypy.readthedocs.io/en/latest/kinds_of_types.html#union-types https://mypy.readthedocs.io/en/latest/kinds_of_types.html#un...