Require merging mode to be specified

src/pyaro_readers/merging_reader.py

@@ -1,15 +1,7 @@
-import logging
-from datetime import datetime, timedelta
-from pathlib import Path
 from typing import Literal, Any
-from collections.abc import Iterable
-import importlib.resources
-import dataclasses
 
-from tqdm import tqdm
 import numpy as np
 import cf_units
-import polars
 from pyaro.timeseries.AutoFilterReaderEngine import (
     AutoFilterReader,
     AutoFilterEngine,
@@ -91,7 +83,9 @@ def __len__(self) -> int:
 
 
 class MergingReader(AutoFilterReader):
-    def __init__(self, datasets: list[dict[str, Any]], filters=[]):
+    def __init__(self, datasets: list[dict[str, Any]], mode: Literal["concat"], filters=[]):
+        if mode != "concat":
+            raise MergingReaderException("Only merging mode \"concat\" is supported as of now")
         self._datasets = []
         self._set_filters(filters)
         for d in datasets:

tests/test_merginreader.py

@@ -14,6 +14,7 @@ def test_stuff():
             {"readername": "ascii2netcdf", "filename": EBAS_URL},
             {"readername": "ascii2netcdf", "filename": EBAS_URL},
         ],
+        mode="concat",
         filters=[],
     ) as ts:
         ts.variables()