dtype in not working in mad() function

[ift38375]

df = pd.DataFrame(diSales, dtype=pd.Int32Dtype()).why ? What is use of this line ?

This is about new Pandas feature, see docs here.
if you call df.info(), you find that the data frame is of integer type; Nevertheless, .mad method, along with .mean method, still automatically convert it to a float type. So, the result of .mad execution has <float> type.

I think Df.info()is used for getting information about column-wise data type of dataframe but it is not used for convert whole float output into int. am i right ?