using np.iterable and np.isscalar instead of isinstance(....

nabu/preproc/alignment.py

@@ -787,7 +787,7 @@ class CenterOfRotationAdaptiveSearch(CenterOfRotation):
             messagge_template = (
                 "The guess parameter can be None, a sequence of one or two scalars, or a scalar. It was instead %s\n"
             )
-            if isinstance(guess, (list, tuple, np.ndarray)):
+            if np.iterable(guess):
                 if len(guess) == 2:
                     guess_x = guess[0]
                     guess_r = guess[1]
@@ -798,7 +798,7 @@ class CenterOfRotationAdaptiveSearch(CenterOfRotation):
                     message = message_template % (guess)
                     raise ValueError(message)
 
-            elif isinstance(guess, (float, int)):
+            elif np.isscalar(guess):
                 guess_x = guess
                 guess_r = None
             else: