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feat(mypy): better typing for applicator funcs #308

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feat(mypy): better typing for applicator funcs #308

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12 changes: 8 additions & 4 deletions eth_utils/applicators.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@
Generator,
List,
Tuple,
TypeVar,
Union,
)
import warnings
Expand All @@ -23,6 +24,9 @@
curry,
)

TArg = TypeVar("TArg")
TReturn = TypeVar("TReturn")

Formatters = Callable[[List[Any]], List[Any]]


Expand Down Expand Up @@ -83,8 +87,8 @@ def apply_formatters_to_sequence(


def apply_formatter_if(
condition: Callable[..., bool], formatter: Callable[..., Any], value: Any
) -> Any:
condition: Callable[[TArg], bool], formatter: Callable[[TArg], TReturn], value: TArg
) -> Union[TArg, TReturn]:
if condition(value):
return formatter(value)
else:
Expand Down Expand Up @@ -131,8 +135,8 @@ def apply_formatters_to_dict(

@return_arg_type(1)
def apply_formatter_to_array(
formatter: Callable[..., Any], value: List[Any]
) -> Generator[List[Any], None, None]:
formatter: Callable[[TArg], TReturn], value: List[TArg]
) -> Generator[TReturn, None, None]:
for item in value:
yield formatter(item)

Expand Down