Career- Java or Python job as Fresher

Hey hi, I really don't know what to choose I almost have two offers one on core Java based projects and another one as data analyst using python.(both offers are like they give training and hire)once I choose data analyst do I need to worry about learning basics of java again to try for big companies after 2-3years? Or strong skills on python is enough to clear interview without knowing the basics of Java?or go for java vased work and learn python later.. Which is safe side.