How to divide the value of pandas columns by the other column

Question

I have a dataframe:

>>> dt
                   COL000   COL001   QT
STK_ID  RPT_Date                       
STK000  20120331   2.6151   2.1467    1
          


        

Answer 1

The / operator for dv seems equal to div with default axis "columns". Set the axis to "index", then it'll work.

df = df.div(df.QT, axis='index')

Another tricky way is to transpose it first, divide it, and then transpose back:

df = (df.T / df.QT).T