fix ruff

src/traffic/core/airspace.py

@@ -2,6 +2,7 @@
 
 import json
 from functools import cached_property, lru_cache
+from itertools import pairwise
 from pathlib import Path
 from typing import (
     TYPE_CHECKING,
@@ -410,7 +411,7 @@ def unary_union_with_alt(polyalt: AirspaceList) -> AirspaceList:
         simple_union = unary_union([p for p, *_ in polyalt])
         return [ExtrudedPolygon(simple_union, float("-inf"), float("inf"))]
     results: List[ExtrudedPolygon] = []
-    for low, up in zip(slices, slices[1:]):
+    for low, up in pairwise(slices):
         matched_poly = [
             p
             for (p, low_, up_) in polyalt

tests/test_flightplan.py

@@ -1,3 +1,4 @@
+from itertools import pairwise
 from typing import List, cast
 
 import pandas as pd
@@ -180,7 +181,7 @@ def test_flightplan() -> None:
         assert any(isinstance(p, SpeedLevel) for p in elts)
         # we can parse everything
         assert all(p is not None for p in elts)
-        for cur_, next_ in zip(elts, elts[1:]):
+        for cur_, next_ in pairwise(elts):
             # never two consecutive airways
             assert not isinstance(cur_, Airway) or not isinstance(next_, Airway)
             # never two consecutive navaids (coordinate points are ok though)