Fix a bug when there is no matching setups

em27_metadata/interfaces.py

@@ -100,6 +100,9 @@ def get(
         for s1, s2 in zip(relevant_setups[:-1], relevant_setups[1 :]):
             assert s1.to_datetime < s2.from_datetime, f"this should not happen, overlapping setups: {s1} and {s2}"
 
+        if len(relevant_setups) == 0:
+            return []
+
         # crop setups list to requested time period
 
         if relevant_setups[0].from_datetime < from_datetime:

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "em27_metadata"
-version = "1.1.1"
+version = "1.1.2"
 description = "Single source of truth for ESM's EM27 measurement logistics"
 authors = [
     { name = "Moritz Makowski", email = "[email protected]" },

tests/test_getter_function.py

@@ -62,9 +62,14 @@ def test_getter_function() -> None:
         campaigns=em27_metadata.types.CampaignMetadataList(root=[]),
     )
 
+    from_datetime = datetime.datetime.fromisoformat("2018-02-01T00:00:00+00:00")
+    to_datetime = datetime.datetime.fromisoformat("2019-02-02T23:59:59+00:00")
+    chunks = metadata.get("sid1", from_datetime, to_datetime)
+    # none
+    assert len(chunks) == 0
+
     from_datetime = datetime.datetime.fromisoformat("2020-02-01T00:00:00+00:00")
     to_datetime = datetime.datetime.fromisoformat("2020-02-02T23:59:59+00:00")
-
     chunks = metadata.get("sid1", from_datetime, to_datetime)
     # 1-10, 12-22, 22-24