TYP: Add None return type to __init__ methods

Co-authored-by: Zvi Baratz <z.baratz@gmail.com>

Author: effigies

nibabel/deprecated.py

@@ -33,7 +33,7 @@ class ModuleProxy:
     module.
     """
 
-    def __init__(self, module_name: str):
+    def __init__(self, module_name: str) -> None:
         self._module_name = module_name
 
     def __getattr__(self, key: str) -> ty.Any:

nibabel/onetime.py

@@ -119,7 +119,7 @@ class OneTimeProperty(ty.Generic[T]):
     This is meant to be used mostly by the auto_attr decorator in this module.
     """
 
-    def __init__(self, func: ty.Callable[[InstanceT], T]):
+    def __init__(self, func: ty.Callable[[InstanceT], T]) -> None:
         """Create a OneTimeProperty instance.
 
         Parameters

nibabel/tripwire.py

@@ -45,7 +45,7 @@ class TripWire:
     TripWireError: We do not have a_module
     """
 
-    def __init__(self, msg: str):
+    def __init__(self, msg: str) -> None:
         self._msg = msg
 
     def __getattr__(self, attr_name: str) -> Any: