code sample for pandas-dev#37115

Author: simonjayhawkins

bisect/37115.py

@@ -0,0 +1,19 @@
+import pandas as pd
+
+print(pd.__version__)
+
+df1 = pd.DataFrame({"a": ["A", "A", "B"], "b": ["ca", "cb", "cb"], "v": [10] * 3})
+
+df1 = df1.set_index(["a", "b"])
+
+# int column
+df1["is_"] = 1
+
+df1 = df1.unstack("b")
+
+# Will not work, keeping NaN in the value
+df1[("is_", "ca")] = df1[("is_", "ca")].fillna(0)
+
+# Will raise ValueError: Cannot convert non-finite values (NA or inf) to integer
+df1[("is_", "ca")] = df1[("is_", "ca")].astype("uint8")
+print(df1)