code sample for pandas-dev#43568

simonjayhawkins · Sep 22, 2021 · 1cb4ec8 · 1cb4ec8
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commit 1cb4ec8
Showing 1 changed file with 12 additions and 0 deletions.
diff --git a/bisect/43568.py b/bisect/43568.py
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+# REGR: change in output of groupby.apply in 1.3.2 -> 1.3.3 #43568
+
+import pandas as pd
+
+print(pd.__version__)
+
+df = pd._testing.makeTimeDataFrame()
+
+result = df.groupby(df.index.month).apply(lambda x: x.drop_duplicates())
+print(result)
+
+assert isinstance(result.index, pd.MultiIndex)