handle trivial executor

scikit-hep · Oct 15, 2023 · 7dd99fb · 7dd99fb
1 parent c588cea
commit 7dd99fb
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/uproot/source/fsspec.py b/src/uproot/source/fsspec.py
@@ -140,7 +140,10 @@ def chunks(
 
         chunks = []
         # _cat_file is async while cat_file is not
-        cat_file = self._fs._cat_file if self._fs.async_impl else self._fs.cat_file
+        is_async = (
+            self._fs.async_impl and type(self._executor).__name__ == "LoopExecutor"
+        )
+        cat_file = self._fs._cat_file if is_async else self._fs.cat_file
         for start, stop in ranges:
             future = self._executor.submit(cat_file, self._file_path, start, stop)
             chunk = uproot.source.chunk.Chunk(self, start, stop, future)