Typehint wrapping (hgrecco#1436)

fixed type hints in function wrapper

AUTHORS

@@ -45,6 +45,7 @@ Other contributors, listed alphabetically, are:
 * Ryan Dwyer <[email protected]>
 * Ryan Kingsbury <[email protected]>
 * Ryan May
+* Sebastian Kosmeier
 * Sigvald Marholm <[email protected]>
 * Sundar Raman <[email protected]>
 * Tiago Coutinho <[email protected]>

CHANGES

@@ -4,6 +4,7 @@ Pint Changelog
 0.19 (unreleased)
 -----------------
 
+- Fix type hints of function wrapper (Issue #1431)
 - Upgrade min version of uncertainties to 3.1.4
 - Fix setting options of the application registry (Issue #1403).
 - Fix Quantity & Unit `is_compatible_with` with registry active contexts (Issue #1424).

pint/registry_helpers.py

@@ -186,8 +186,8 @@ def _apply_defaults(func, args, kwargs):
 
 def wraps(
     ureg: "UnitRegistry",
-    ret: Union[str, "Unit", Iterable[str], Iterable["Unit"], None],
-    args: Union[str, "Unit", Iterable[str], Iterable["Unit"], None],
+    ret: Union[str, "Unit", Iterable[Union[str, "Unit", None]], None],
+    args: Union[str, "Unit", Iterable[Union[str, "Unit", None]], None],
     strict: bool = True,
 ) -> Callable[[Callable[..., T]], Callable[..., Quantity[T]]]:
     """Wraps a function to become pint-aware.
@@ -204,9 +204,9 @@ def wraps(
     ----------
     ureg : pint.UnitRegistry
         a UnitRegistry instance.
-    ret : str, pint.Unit, iterable of str, or iterable of pint.Unit
+    ret : str, pint.Unit, or iterable of str or pint.Unit
         Units of each of the return values. Use `None` to skip argument conversion.
-    args : str, pint.Unit, iterable of str, or iterable of pint.Unit
+    args : str, pint.Unit, or iterable of str or pint.Unit
         Units of each of the input arguments. Use `None` to skip argument conversion.
     strict : bool
         Indicates that only quantities are accepted. (Default value = True)
@@ -220,7 +220,7 @@ def wraps(
     ------
     TypeError
         if the number of given arguments does not match the number of function parameters.
-        if the any of the provided arguments is not a unit a string or Quantity
+        if any of the provided arguments is not a unit a string or Quantity
 
     """