Controlled Variables in Logistic Regression in Python

I just learned what controlled variables mean for a project that I am doing, and I was trying to find if sci-kit learn has a controlled variable option. Specifically, does Python have controlled variable (not independent variables) for the logistic regression?

I googled stuff and found nothing for Python. However, I was thinking more basic and that controlled variables means stratifying the group you are interested (say race) and then going analysis on each group based on your x's and y. If this is correct, then I am suppose to interpret the results from those stratified groups, right?

Sorry, I asked two questions, but I am trying to gain much info on this controlled group idea and applications on Python