code sample for pandas-dev#42092

Author: simonjayhawkins

bisect/42092.py

@@ -0,0 +1,13 @@
+# BUG?: 1.3.0rc behavior change with concatenating boolean and numeric columns #42092
+
+import pandas as pd
+
+print(pd.__version__)
+
+df1 = pd.DataFrame(pd.Series([True, False, True, True], dtype="bool"))
+df2 = pd.DataFrame(pd.Series([1, 0, 1], dtype="int64"))
+
+result = pd.concat([df1, df2])  # dtype changed from int64 to object
+print(result)
+
+assert result[0].dtype == "int64", result[0].dtype