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enthought / traits

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Proposal: "Optional(Foo)" as a synonym for "Union(None, Foo)"

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corranwebster
corranwebster commented Sep 30, 2020

It is common to have Union traits of the form Union(None, <something>). As a convenience to developers, and following a similar convention in Python's typing module, we should consider having Optional(<something>) as an alternative way of writing Union(None, <something>).

An alternative would be to make allow_none metadata universally accepted across TraitType instances.

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type: enhancement type: discussion easy good first issue

smarie / python-autoclass

Star 30

A python 3 library providing functions and decorators to automatically generate class code, such as constructor body or properties getters/setters along with optional support of validation contracts on the generated setters. Its objective is to reduce the amount of copy/paste code in your classes - and hence to help reducing human mistakes :).

boilerplate code-generator class property properties attribute constructor fields contracts auto enforce setter type-hints typechecking pep484 getter runtime-typechecking autoargs autoprops attr
  • Updated Apr 19, 2021
  • Python

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