So, In last two days : I successfully implemented my intended architecture. Firstly, I successfully implemented automatic upload of csv or xls file and analysis of dataframe. It provides total marks of all students, each subject toppers and graphical comparison of all students. Today, I woke up and started working on Manual upload. So, when user manually uploads data, they get a language selection panel. Afterward, according to their selection a table is generated. From where, they can enter the data and get same functionality which they were getting while automatic upload. So, now I have to correct some style.css and it will be ready for final shipment tomorrow.