Improve loading from ramses + hdf5 consersion

utils/convert_to_hdf5.py

@@ -0,0 +1,8 @@
+# coding: utf-8
+
+from snapshotprocessor import SnapshotProcessor
+
+
+def convert_to_hdf5(path, snap_num, path_out=".", filename=None, **kwargs):
+    snap = SnapshotProcessor(path=path, num=snap_num, path_out=path_out, **kwargs)
+    snap.convert_hdf5(filename)

utils/runselector.py

@@ -100,7 +100,11 @@ class RunSelector:
         self.allow_nodata = allow_nodata
 
         self.namelist = {}
-        do_tests = (not self.fallback_nml) or (len(filter_nml) > 0)
+        do_tests = (
+            (not self.fallback_nml)
+            or (len(filter_nml) > 0)
+            or (sort_run_by is not None)
+        )
         self.runs = self.get_runs(
             in_runs, filter_name, filter_nml, sort_run_by, do_tests=do_tests
         )