code sample for pandas-dev#43422

Author: simonjayhawkins

bisect/43422.py

@@ -0,0 +1,18 @@
+# BUG: Regression in 1.3.0: Exception when setting arrays as cell values #43422
+
+from numpy import zeros
+
+import pandas as pd
+from pandas import DataFrame
+
+print(pd.__version__)
+
+# (Leaving out the dtype doesn't change things)
+frame = DataFrame(columns=["x", "P"], dtype=object)
+data = {"x": zeros((2,)), "P": zeros((2, 2))}
+expected = frame.append(data, ignore_index=True)
+
+frame.loc[0] = data
+print(frame)
+
+pd.testing.assert_frame_equal(frame, expected)