code sample for pandas-dev#45802

Author: simonjayhawkins

bisect/45802.py

@@ -0,0 +1,18 @@
+# BUG: Type error in groupby.transform(interpolate) #45802
+
+import numpy as np
+import pandas as pd
+
+np.random.seed(500)
+test_df = pd.DataFrame(
+    {
+        "a": np.random.randint(low=0, high=1000, size=10000),
+        "b": np.random.choice(
+            [1, 2, 4, 7, np.nan], size=10000, p=([0.2475] * 4 + [0.01])
+        ),
+    }
+)
+grp = test_df.groupby("a")
+
+result = grp.transform(pd.DataFrame.interpolate)
+print(result)