Typelets 1.1.0

Release date: December 9, 2025

typelets.funcs

Added type_func_params_as() and type_method_params_as(), which can be used as decorators to “inherit” the typing from one function to another. This will automatically apply typing to *args and **kwargs to match the annotations that exist on another function.

These do have some limitations on usage and compatibility. See the documentation for each of the methods for details.

typelets.json

Fixed up some type definitions which were incompatible with Python 3.8.

typelets.runtime

Added the new typelets.runtime module, which contains utilities for working with types at run-time (as opposed to just type-checking).

This contains a new method, raise_invalid_type(), which works a lot like typing.assert_never(), but allows raising exceptions other than AssertionError. This makes it easier to write code which performs runtime checking for defensiveness while also satisfying type checkers that do dead-code checks.

Contributors

• Christian Hammond

• David Trowbridge

• Michelle Aubin