code sample for pandas-dev#45311

Author: simonjayhawkins

bisect/45311.py

@@ -0,0 +1,21 @@
+# BUG: "replace" does not work with different numpy-int types even when values are the same #45311
+
+import numpy as np
+import pandas as pd
+
+print(pd.__version__)
+
+maps = pd.Series(
+    [np.int64(0), np.int64(2), np.int64(1)]
+)  # index-value should be mapped to series-value
+map_dict = {old: new for (old, new) in zip(maps.values, maps.index)}
+
+labs = pd.Series([1, 1, 1, 0, 0, 2, 2, 2]).astype(
+    np.int32
+)  # Simulate a list of observations
+
+result = labs.replace(map_dict)
+print(result)
+
+# test against old incorrect behaviour to find commit that fixes
+pd.testing.assert_series_equal(result, labs)