Creatiing a software using object oriented programming [on hold]

Creatiing a software using object oriented programming [on hold] References This is a question from a coder (beginner level), not a programmer. My plan is to create a software using Python. This software will fetch some raw data contained inside some files which are generated daily in some ftp folders. Then it will clean up those raw data. After all the cleaning and processing, it will plot the processed daily data into graphs using Python matplot library. I will also use Tkinter to make a simple GUI. I think I can do it by writing some low quality code. However, I would prefer to do it using classes and object-oriented programming in general, but I don\'t know how to incorporate classes in this case. What would be you brief plan/design to create this software? How many classes would you use (if any at all)? How much time would this project take? Thank you! More details added: The daily files which the data will be fetched contain satellite observation data taken every minute. The data are in a column format. The program will make some text formatting operations to clean the data and extract what is needed. Also, there will be mathematical operations such as averaging the minute values to hourly numbers. I think to save those values inside lists. Then, I will use those numbers to make daily graphs that visualize the hourly values. Every graph will be saved automatically as a picture file every day inside a folder. There will be a simple graphical interface for with buttons such as \"Browse\", \"Show plot\" etc.