Please advise on how to select the second max date in df rows.
I have a df like this:
ID Count DDate1 DDate2 DDate3 DDate4 DDate5
Columns with ddate
are converted to datetime.
The max value I have found in this way:
cols_1 = df_deal_employee.columns[2:6]
df['max_date'] = df[cols_1].max(1)
But can I create a column with the following max date? (second largest).