small changes in template_update

Author: djarecka

pydra/engine/core.py

@@ -381,7 +381,7 @@ def _run(self, rerun=False, **kwargs):
             orig_inputs = attr.asdict(self.inputs)
             map_copyfiles = copyfile_input(self.inputs, self.output_dir)
             modified_inputs = template_update(self.inputs, map_copyfiles)
-            if modified_inputs is not None:
+            if modified_inputs:
                 self.inputs = attr.evolve(self.inputs, **modified_inputs)
             self.audit.start_audit(odir)
             result = Result(output=None, runtime=None, errored=False)

pydra/engine/helpers_file.py

@@ -505,7 +505,7 @@ def template_update(inputs, map_copyfiles=None):
                     f"output_file_template metadata for "
                     "{fld.name} should be a string"
                 )
-    return {k: v for k, v in dict_.items() if getattr(inputs, k) != v}
+    return {k: v for k, v in dict_.items() if getattr(inputs, k) is not v}
 
 
 def is_local_file(f):