filesize_sum.py

import os
"""
as bash command: du -sb dir
+4906: add 4096bytes for the top dir
"""
def du_sb(dir):
 return sum(os.path.getsize(f) for f in reduce(lambda x,y:x+y, [[os.path.join(w[0], fe) for fe in w[1] + w[2]]  for w in os.walk(dir)])) + 4096;

def get_total_file_size(dir):
    return sum(os.path.getsize(f) for f in reduce(lambda x,y:x+y, [[os.path.join(w[0], fe) for fe in w[1] + w[2]]  for w in os.walk(dir)]) if os.path.isfile(f))