From f1c56757efce4303a3d9ab4ea9cede52afe166c8 Mon Sep 17 00:00:00 2001
From: raph-rc <70120121+raph-rc@users.noreply.github.com>
Date: Wed, 25 Mar 2026 15:10:41 -0400
Subject: [PATCH] Fix TypeError thrown when specifying interpolator for
 ANTsRegistrator

`interpolator` was passed twice to `ants.transform` when it was
specified as an additional argument in
`ANTsRegistrator(transformation_params={'interpolator': 'value'})`. This
change makes sure to pass it only once, and that the specified value
takes precedence over the default.
---
 brainles_preprocessing/registration/ANTs/ANTs.py | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/brainles_preprocessing/registration/ANTs/ANTs.py b/brainles_preprocessing/registration/ANTs/ANTs.py
index fa0808e..3c55738 100644
--- a/brainles_preprocessing/registration/ANTs/ANTs.py
+++ b/brainles_preprocessing/registration/ANTs/ANTs.py
@@ -169,15 +169,16 @@ def transform(
         """
         start_time = datetime.datetime.now()
 
+        # TODO - self.transformation_params
+        # we update the transformation parameters with the provided kwargs
+        transform_kwargs = {**self.transformation_params, **kwargs}
+        interpolator = transform_kwargs.pop('interpolator', interpolator)
+
         assert interpolator in VALID_INTERPOLATORS, (
             f"Invalid interpolator: {interpolator}. "
             f"Valid options are: {', '.join(VALID_INTERPOLATORS)}."
         )
 
-        # TODO - self.transformation_params
-        # we update the transformation parameters with the provided kwargs
-        transform_kwargs = {**self.transformation_params, **kwargs}
-
         # Convert all paths to Path objects
         fixed_image_path = Path(fixed_image_path)
         moving_image_path = Path(moving_image_path)