import os
from subprocess import Popen, PIPE

def getFolderSize(folder):
  total_size = os.path.getsize(folder)
  for item in os.listdir(folder):
    itempath = os.path.join(folder, item)
    if os.path.isfile(itempath):
      total_size += os.path.getsize(itempath)
      if os.path.isdir(itempath):
        total_size += getFolderSize(itempath)
  return total_size

def compress(output_file, directory):
  process = Popen(["C:/Program Files/7-Zip/7z.exe", "a", output_file, directory+os.path.sep+"*", "-mx9", "-aoa"], stdout=PIPE)
  process.communicate()
  exit_code = process.wait()
  if (exit_code != 0):
    print ("Copression of " + directory + " failed")
  else:
    print ("Copressed " + directory + " to " + output_file)



rootdir = "C:/temp/test/"

for root,dirs,files in os.walk(rootdir, topdown=True):
    depth = root[len(rootdir) + len(os.path.sep):].count(os.path.sep)
    if depth > 3:
      dirs[:] = [] # Don't recurse any deeper
      continue

    for dir in dirs:
      if "archive" in dir:
        path = os.path.join(root, dir)
        size = getFolderSize(path)
        print (path, size)
        if len(os.listdir(path) ) != 0:
          compress(root + os.path.sep + "archive.7z", path)