code sample for pandas-dev#45836

Author: simonjayhawkins

bisect/45836.py

@@ -0,0 +1,16 @@
+# BUG: Pandas 1.4.0 - pd.NaT can not be replaced. #45836
+
+import numpy as np
+import pandas as pd
+
+print(pd.__version__)
+
+df = pd.DataFrame([pd.NaT, pd.NaT])
+result = df.replace({pd.NaT: None, np.NaN: None})
+print(result)
+# Either pd.NaT or pd.np.NaN work in 1.3.5
+
+expected = pd.DataFrame([None, None])
+
+pd.testing.assert_frame_equal(result, expected)
+