Open with post-fix filename fails

servicex/data_conversions.py

@@ -163,7 +163,7 @@ def do_the_work(file: Path) -> ak.Array:
                 return uproot.lazy(f"{file}:{tree_name}")  # type: ignore
 
             if hasattr(uproot, "dask"):
-                return uproot.dask(f"{file}:{tree_name}")  # type: ignore
+                return uproot.dask({str(file): tree_name})  # type: ignore
 
             assert (
                 False

tests/test_data_conversions.py

@@ -1,3 +1,4 @@
+import shutil
 from servicex import ServiceXException
 from servicex.data_conversions import DataConverterAdaptor
 import pytest
@@ -62,6 +63,17 @@ async def test_root_to_awkward(good_root_file_path):
     check_awkward_accessible(df["JetPt"])  # type: ignore
 
 
+@pytest.mark.asyncio
+async def test_root_to_awkward_postfix_filename(good_root_file_path, tmp_path):
+    # Found in the wild see #337.
+    postfix_file = tmp_path / "test.root.1"
+    shutil.copy(good_root_file_path, postfix_file)
+
+    df = await DataConverterAdaptor("root-file").convert_to_awkward(postfix_file)
+    assert len(df["JetPt"]) == 283458  # type: ignore
+    check_awkward_accessible(df["JetPt"])  # type: ignore
+
+
 @pytest.mark.asyncio
 async def test_to_awkward_fail(good_root_file_path):
     with pytest.raises(ServiceXException):