code sample for pandas-dev#38874

simonjayhawkins · Jan 1, 2021 · e0327f7 · e0327f7
1 parent eeb0d59
commit e0327f7
Showing 1 changed file with 12 additions and 0 deletions.
diff --git a/bisect/38874.py b/bisect/38874.py
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+import pandas as pd
+
+print(pd.__version__)
+
+df = pd.DataFrame({"A": [1e-8, -1.1e-8, 1.2e-8, -1.1e-8] * 5})
+
+result = df["A"].rolling(10).std(ddof=0)
+print(result)
+
+expected = df["A"][-10:].std(ddof=0)
+
+assert result[19] == expected