get_folder_size.py

from os import walk, path

def get_folder_size(start_path):
    """"Output size of folder in bytes"""
    total_size = 0
    for dir_path, dir_names, file_names in walk(start_path):
        for f in file_names:
            fp = path.join(dir_path, f)
            # skip if it is symbolic link
            if not path.islink(fp):
                total_size += path.getsize(fp)
    return total_size