code sample for pandas-dev#46675

Author: simonjayhawkins

bisect/46675.py

@@ -0,0 +1,28 @@
+# Index is being materialized in pd.concat when axis=1 #46675
+
+import pandas as pd
+
+print(pd.__version__)
+
+s1 = pd.Series(["a", "b", "c"])
+s2 = pd.Series(["a", "b"])
+s3 = pd.Series(["a", "b", "c", "d"])
+s4 = pd.Series([])
+# <stdin>:1: FutureWarning: The default dtype for empty Series will be 'object' instead of 'float64' in a future version. Specify a dtype explicitly to silence this warning.
+
+sort = False
+join = "outer"
+ignore_index = False
+axis = 1
+
+result = pd.concat(
+    [s1, s2, s3, s4],
+    sort=sort,
+    join=join,
+    ignore_index=ignore_index,
+    axis=axis,
+)
+
+print(result.index)
+
+assert isinstance(result.index, pd.RangeIndex)