Proposal: `PrivateSet[T]` — a type hint for externally read-only, internally writable fields

[blhsing (Ben Hsing)]

@gitkoi

The name ReadOnly is already used in TypedDict (PEP 705) and other libraries, so alternative names are proposed to avoid confusion

ReadOnly is arguably the best name for the purpose and should not cause confusion since the current use is confined to TypedDict only.

You can refer to the existing thread/PEP on this topic:

PEP 767: Annotating Read-Only Attributes

Hi, I’m presenting PEP 767. It enables the use of ReadOnly within attribute annotations, as a way to remove [1] the ability to reassign or delete an attribute of an object. Any feedback is welcome! at a type checking level ︎