Getting value of current .step

Hi, apologies for making an issue, but I have a question.

I have a simulation which implements a .step command for different values.

The problem is that when I plot the values in python from the raw file, even though I can get the values for each case, I would like to know how I can get the values of the current case in code. i.e. if I step Rs from 1 to 10 Ohm, how do I know what was the value for Rs in the current case?