refactor to fix pylint's cell-var-from-loop warnings

freesurfer_volume_reader/__main__.py

@@ -76,11 +76,11 @@ def main():
     }
     volume_frames = []
     for source_type in args.source_types:
-        find_volume_files = lambda dir_path: VOLUME_FILE_FINDERS[source_type].find(
-            root_dir_path=dir_path, filename_regex=filename_regexs[source_type]
-        )
+        finder = VOLUME_FILE_FINDERS[source_type]
         for root_dir_path in args.root_dir_paths:
-            for volume_file in find_volume_files(root_dir_path):
+            for volume_file in finder.find(
+                root_dir_path=root_dir_path, filename_regex=filename_regexs[source_type]
+            ):
                 volume_frame = volume_file.read_volumes_dataframe()
                 volume_frame["source_type"] = source_type
                 volume_frame["source_path"] = volume_file.absolute_path