cs-typingutils 20250503

Trite hacks for use with typing.

Trite hacks for use with typing.

Latest release 20250503: is_optional: bugfix: Optional[T] has a get_args of (T,), not (T,None).

Short summary:

• is_optional: Check if annotation is an Optional[type]. Return type if so, None otherwise.
• subtype: Construct a TypeVar for subtypes of the type t.

Module contents:

• is_optional(annotation): Check if annotation is an Optional[type]. Return type if so, None otherwise.

• subtype(t, name=None): Construct a TypeVar for subtypes of the type t.

  Parameters:

  • t: the type which bounds the TypeVar
  • name: optional name for the TypeVar, default t.__name__ + 'SubType'

Release Log

Release 20250503: is_optional: bugfix: Optional[T] has a get_args of (T,), not (T,None).

Release 20250428: New is_optional(annotation) function to recognise Optional[type] annotations, returning type if true, None otherwise.

Release 20230331: Initial release.