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pydata · Sep 18, 2023 · 184aeee · 184aeee
1 parent 1e51e72
commit 184aeee
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/xarray/core/rolling_exp.py b/xarray/core/rolling_exp.py
@@ -12,7 +12,10 @@
 
 
 def _get_alpha(
-    com: float | None, span: float | None, halflife: float | None, alpha: float | None
+    com: float | None = None,
+    span: float | None = None,
+    halflife: float | None = None,
+    alpha: float | None = None,
 ) -> float:
     # pandas defines in terms of com (converting to alpha in the algo)
     # so use its function to get a com and then convert to alpha