STY: Apply ruff/flake8-bugbear rule B004

B004 Using `hasattr(x, "__call__")` to test if x is callable is unreliable.
     Use `callable(x)` for consistent results.

nipype/interfaces/utility/wrappers.py

@@ -72,7 +72,7 @@ def __init__(
 
         super().__init__(**inputs)
         if function:
-            if hasattr(function, "__call__"):
+            if callable(function):
                 try:
                     self.inputs.function_str = getsource(function)
                 except OSError:
@@ -103,7 +103,7 @@ def __init__(
 
     def _set_function_string(self, obj, name, old, new):
         if name == "function_str":
-            if hasattr(new, "__call__"):
+            if callable(new):
                 function_source = getsource(new)
                 fninfo = new.__code__
             elif isinstance(new, (str, bytes)):

nipype/pipeline/plugins/debug.py

@@ -15,7 +15,7 @@ def __init__(self, plugin_args=None):
         if (
             plugin_args
             and "callable" in plugin_args
-            and hasattr(plugin_args["callable"], "__call__")
+            and callable(plugin_args["callable"])
         ):
             self._callable = plugin_args["callable"]
         else: