name_source for lists

Author: chrisgorgo

nipype/interfaces/base.py

@@ -1466,7 +1466,10 @@ def _filename_from_source(self, name):
                         break
             else:
                 name_source = trait_spec.name_source
-            _, base, _ = split_filename(getattr(self.inputs, name_source))
+            source = getattr(self.inputs, name_source)
+            while isinstance(source, list):
+                source = source[0]
+            _, base, _ = split_filename(source)
             retval = name_template % base
             _, _, ext = split_filename(retval)
             if trait_spec.keep_extension and ext: