Merge branch 'aiwieder/close_file' into 'master'

Close file and simplify hist_counter

See merge request !44

src/LbAPCommon/checks_utils.py

@@ -26,14 +26,11 @@ def hist_to_root(job_name, check_result, output_path):
     checks_with_histo = ["range", "range_nd", "range_bkg_subtracted"]
     if check_result.check_type in checks_with_histo:
         file_name = f"{job_name}_{check_result.check_type}_histograms.root"
-        file_root = uproot.recreate(join(output_path, file_name))
-
-        for key, data in check_result.tree_data.items():
-            hist_counter = 0
-            for _histo in data.get("histograms", []):
-                hist_counter += 1
-                histo_name = f"{key}/{hist_counter-1}"
-                file_root[histo_name] = _histo
+        with uproot.recreate(join(output_path, file_name)) as file_root:
+            for key, data in check_result.tree_data.items():
+                for hist_counter, _histo in enumerate(data.get("histograms", [])):
+                    histo_name = f"{key}/{hist_counter-1}"
+                    file_root[histo_name] = _histo
 
 
 def checks_to_JSON(