Python Signature Lens
Display Haskell-style type signatures above Python functions using CodeLens.
Download here: https://marketplace.visualstudio.com/items?itemName=ubreblanca.python-signature-lens
Features
- Curried function signatures displayed above Python function definitions
- Supports generic type parameters and bounded constraints
- Handles class methods with inherited type parameters
- Works with async functions and multi-line signatures
| Python |
Lens Displays |
Optional[T] |
T? |
T \| None |
T? |
None \| T |
T? |
Union[A, B] |
A \| B |
list[T] |
[T] |
dict[K, V] |
{K: V} |
set[T] |
{T} |
tuple[A, B, C] |
(A, B, C) |
Callable[[A, B], R] |
(A -> B -> R) |
Callable[[], R] |
(() -> R) |
"ForwardRef" |
ForwardRef |
*args: T |
*T |
**kwargs: T |
**T |
Configuration
| Setting |
Description |
Default |
pythonSignatureLens.enabled |
Enable/disable signatures |
true |
pythonSignatureLens.showFunctionName |
Show function name in signature |
true |
pythonSignatureLens.haskellStyleApplication |
Use Haskell-style type application |
false |
Haskell-Style Type Application
When haskellStyleApplication is enabled, generic types use space-delimited syntax:
| Python |
Default |
With haskellStyleApplication |
Iterable[A] |
Iterable[A] |
Iterable A |
Mapping[K, V] |
Mapping[K, V] |
Mapping K V |
Iterator[Sequence[A]] |
Iterator[Sequence[A]] |
Iterator (Sequence A) |
| |
