编写一个python脚本，遍历文件夹并列出每个文件和大小

I'm struggling to find a way to write a script that will go through folders of ArcGIS data and report back the name and size of every feature in the folder to a csv file so that I can create a directory of the data stored within. The data stored within the folders are individual feature classes alongside whole geodatabases. I'm struggling to find a way to write a script