From 99fbb8a4b14eb919ca508d848f345f7a9d6dcb42 Mon Sep 17 00:00:00 2001
From: Thomas-Ulrich <ulrich@geophysik.uni-muenchen.de>
Date: Tue, 3 Feb 2026 13:52:33 +0100
Subject: [PATCH 1/2] allow group filter on mesh

---
 seissolxdmfwriter/pyproject.toml              |  2 +-
 .../seissol_output_extractor.py               |  4 ++-
 .../seissolxdmfwriter/seissolxdmfwriter.py    | 35 +++++++++++++------
 3 files changed, 29 insertions(+), 12 deletions(-)

diff --git a/seissolxdmfwriter/pyproject.toml b/seissolxdmfwriter/pyproject.toml
index 95bad2d..c835b74 100644
--- a/seissolxdmfwriter/pyproject.toml
+++ b/seissolxdmfwriter/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "seissolxdmfwriter"
-version = "0.4.5"
+version = "0.4.6"
 authors = [
     {name = "SeisSol Group"},
 ]
diff --git a/seissolxdmfwriter/seissolxdmfwriter/seissol_output_extractor.py b/seissolxdmfwriter/seissolxdmfwriter/seissol_output_extractor.py
index 9b90ac5..279832a 100755
--- a/seissolxdmfwriter/seissolxdmfwriter/seissol_output_extractor.py
+++ b/seissolxdmfwriter/seissolxdmfwriter/seissol_output_extractor.py
@@ -163,9 +163,11 @@ def GetFilteredCells(self, regionFilter, xRange, yRange, zRange):
                 region_varname = "fault-tag"
             elif "locationFlag" in available:
                 region_varname = "locationFlag"
+            elif "group" in available:
+                region_varname = "group"
             else:
                 raise ValueError(
-                    f"fault-tag or locationFlag not in available variables {available}"
+                    f"fault-tag, locationFlag or group not in available variables {available}"
                 )
             tags = self.Read1dData(region_varname, self.nElements, isInt=True)
             regions = regionFilter[0].split(",")
diff --git a/seissolxdmfwriter/seissolxdmfwriter/seissolxdmfwriter.py b/seissolxdmfwriter/seissolxdmfwriter/seissolxdmfwriter.py
index 5f9e2d9..3776b1a 100644
--- a/seissolxdmfwriter/seissolxdmfwriter/seissolxdmfwriter.py
+++ b/seissolxdmfwriter/seissolxdmfwriter/seissolxdmfwriter.py
@@ -517,13 +517,28 @@ def write_from_seissol_output(
     )
 
     nel = infer_n_elements(sx, filtered_cells)
-    write_timeseries_xdmf(
-        prefix,
-        sx.ReadNNodes(),
-        nel,
-        sx.ReadNodesPerElement(),
-        dictDataTypes,
-        [sx.ReadTimes()[k] for k in time_indices],
-        reduce_precision,
-        backend,
-    )
+    nNodes = sx.ReadNNodes()
+    node_per_element = sx.ReadNodesPerElement()
+    dictTime = [sx.ReadTimes()[k] for k in time_indices]
+
+    if not dictTime:
+        write_mesh_xdmf(
+            prefix,
+            nNodes,
+            nel,
+            node_per_element,
+            dictDataTypes,
+            reduce_precision,
+            backend,
+        )
+    else:
+        write_timeseries_xdmf(
+            prefix,
+            nNodes,
+            nel,
+            node_per_element,
+            dictDataTypes,
+            dictTime,
+            reduce_precision,
+            backend,
+        )

From 449fa41478f7642a64550dee36237bb2dad9e819 Mon Sep 17 00:00:00 2001
From: Thomas-Ulrich <ulrich@geophysik.uni-muenchen.de>
Date: Tue, 3 Feb 2026 13:52:47 +0100
Subject: [PATCH 2/2] apply isort

---
 seissolxdmfwriter/seissolxdmfwriter/__init__.py           | 5 +++--
 .../seissolxdmfwriter/seissol_output_extractor.py         | 8 +++++---
 seissolxdmfwriter/seissolxdmfwriter/seissolxdmfwriter.py  | 5 +++--
 3 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/seissolxdmfwriter/seissolxdmfwriter/__init__.py b/seissolxdmfwriter/seissolxdmfwriter/__init__.py
index f14c9ab..d406701 100644
--- a/seissolxdmfwriter/seissolxdmfwriter/__init__.py
+++ b/seissolxdmfwriter/seissolxdmfwriter/__init__.py
@@ -1,8 +1,9 @@
 from .seissolxdmfwriter import *
+
 try:
-    from importlib.metadata import version, PackageNotFoundError
+    from importlib.metadata import PackageNotFoundError, version
 except ImportError:
-    from importlib_metadata import version, PackageNotFoundError
+    from importlib_metadata import PackageNotFoundError, version
 
 try:
     __version__ = version("seissolxdmfwriter")
diff --git a/seissolxdmfwriter/seissolxdmfwriter/seissol_output_extractor.py b/seissolxdmfwriter/seissolxdmfwriter/seissol_output_extractor.py
index 279832a..1bc22c6 100755
--- a/seissolxdmfwriter/seissolxdmfwriter/seissol_output_extractor.py
+++ b/seissolxdmfwriter/seissolxdmfwriter/seissol_output_extractor.py
@@ -1,11 +1,13 @@
 #!/usr/bin/env python3
+import argparse
 import os
 import os.path
+from warnings import warn
+
+import numpy as np
 import seissolxdmf
+
 import seissolxdmfwriter as sxw
-import numpy as np
-import argparse
-from warnings import warn
 
 
 def generate_new_prefix(prefix, append2prefix):
diff --git a/seissolxdmfwriter/seissolxdmfwriter/seissolxdmfwriter.py b/seissolxdmfwriter/seissolxdmfwriter/seissolxdmfwriter.py
index 3776b1a..0cc56d8 100644
--- a/seissolxdmfwriter/seissolxdmfwriter/seissolxdmfwriter.py
+++ b/seissolxdmfwriter/seissolxdmfwriter/seissolxdmfwriter.py
@@ -1,8 +1,9 @@
-import numpy as np
 import os
-from tqdm import tqdm
 import sys
 
+import numpy as np
+from tqdm import tqdm
+
 known_1d_arrays = [
     "locationFlag",
     "fault-tag",