Apply ruff flake8-comprehensions (#21694)

examples/research_projects/lxmert/extracting_data.py

@@ -61,7 +61,7 @@ class Extract:
         assert outputfile is not None and not os.path.isfile(outputfile), f"{outputfile}"
         if subset_list is not None:
             with open(os.path.realpath(subset_list)) as f:
-                self.subset_list = set(map(lambda x: self._vqa_file_split()[0], tryload(f)))
+                self.subset_list = {self._vqa_file_split()[0] for x in tryload(f)}
         else:
             self.subset_list = None