Fix pylint complaints

python/podio/test_Frame.py

@@ -7,7 +7,7 @@
 # using root_io as that should always be present regardless of which backends are built
 from podio.root_io import Reader
 
-from test_utils import ExampleHitCollection
+from .test_utils import ExampleHitCollection
 
 # The expected collections in each frame
 EXPECTED_COLL_NAMES = {

python/podio/test_utils.py

@@ -2,14 +2,14 @@
 """Utilities for python unittests"""
 
 import os
+import ROOT
+from podio.frame import Frame
 
-SKIP_SIO_TESTS = os.environ.get("SKIP_SIO_TESTS", "1") == "1"
+ROOT.gSystem.Load("libTestDataModelDict.so")  # noqa: E402
+from ROOT import ExampleHitCollection, ExampleClusterCollection  # noqa: E402 # pylint: disable=wrong-import-position
 
-import ROOT
-ROOT.gSystem.Load("libTestDataModelDict.so")
-from ROOT import ExampleHitCollection, ExampleClusterCollection
 
-from podio.frame import Frame
+SKIP_SIO_TESTS = os.environ.get("SKIP_SIO_TESTS", "1") == "1"
 
 
 def create_hit_collection():
@@ -47,10 +47,10 @@ def create_frame():
   return frame
 
 
-def write_file(WriterT, filename):
+def write_file(writer_type, filename):
   """Write a file using the given Writer type and put one Frame into it under
   the events category
   """
-  writer = WriterT(filename)
+  writer = writer_type(filename)
   event = create_frame()
   writer.write_frame(event, "events")

tests/root_io/write_frame_root.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+"""Script to write a Frame in ROOT format"""
 
 from podio import test_utils
 from podio.root_io import Writer

tests/sio_io/write_frame_sio.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+"""Script to write a Frame in SIO format"""
 
 from podio import test_utils
 from podio.sio_io import Writer