code sample for pandas-dev#45603

simonjayhawkins · simonjayhawkins · commit dbd6d5ae37ed · 2022-02-09T19:16:53.000Z
diff --git a/bisect/45603.py b/bisect/45603.py
@@ -0,0 +1,11 @@
+# BUG: fillna downcast object to int even downcast=False/None #45603
+
+import pandas as pd
+
+print(pd.__version__)
+
+df = pd.Series([1, 2, 3], dtype="object")
+result = df.fillna("", downcast=False)  # will get int64 instead
+print(result)
+
+assert result.dtype == object
