code sample for pandas-dev#44978

Author: simonjayhawkins

bisect/44978.py

@@ -0,0 +1,16 @@
+# BUG: shift with large periods creates mulfunctioning dtypes with master branch #44978
+
+import numpy as np
+
+import pandas as pd
+
+print(pd.__version__)
+
+df = pd.DataFrame(np.random.rand(5, 3))
+result = df.shift(6, axis=1, fill_value=None)
+
+print(result)
+
+expected = pd.DataFrame(np.full((5, 3), np.nan))
+
+pd.testing.assert_frame_equal(result, expected)