code sample for pandas-dev#38980

Author: simonjayhawkins

bisect/38980.py

@@ -0,0 +1,10 @@
+import pandas as pd
+
+print(pd.__version__)
+
+df = pd.DataFrame(
+    {"key": ["a", "a", "b", "b"], "val": ["a", "b", "c", "d"]}, dtype="string"
+)
+
+res = df.groupby("key").agg({"val": "first"})
+print(res)