It's easy to plot acf however I didn't find anywhere a way to extract raw values.
How can I access correlation coefficient and statistical significate by lag index?
Kind of:
x[1] -> (1,NaN)
or
x[12] -> (0.9,0.21)
As Flavia posted in the comment section the answer is to use: statsmodels.tsa.stattools.acf.
Answering to be able to mark it as a proper answer in case somebody else will need it.