4 ms·

I believe the recent idiomatic recommendation for the first two is to use the union type expression: 1. T | None 2. SuccessT | FailureT

• epgui 3y ago
  This is potentially quite helpful, but would you happen to have a source for that?
  • TrickardRixx 3y ago
    The Union Type PEP[0] suggests that the "bitwise or" syntax is equivalent, but cleaner than typing.Union [0]: https://docs.python.org/3/library/stdtypes.html#types-union https://docs.python.org/3/library/stdtypes.html#types-union
    • epgui 3y ago
      Thanks! I missed that.
  • BerislavLopac 3y ago
    They're both perfectly valid; but the expression style [0] is shorter and more obvious, especially compared to Optional. Even the documentation for Optional states [1]: Note that this is not the same concept as an optional argument, which is one that has a default. [0] https://docs.python.org/3.11/library/stdtypes.html#types-union https://docs.python.org/3.11/library/stdtypes.html#types-uni... [1] https://docs.python.org/3.11/library/typing.html#typing.Optional https://docs.python.org/3.11/library/typing.html#typing.Opti...