.
linux:
import os
path = '/home/user/Downloads'
folder = sum([sum(map(lambda fname: os.path.getsize(os.path.join(directory, fname)), files)) for directory, folders, files in os.walk(path)])
MB=1024*1024.0
print "%.2f MB"%(folder/MB)
:
import win32com.client as com
folderPath = r"/home/user/Downloads"
fso = com.Dispatch("Scripting.FileSystemObject")
folder = fso.GetFolder(folderPath)
MB=1024*1024.0
print "%.2f MB"%(folder.Size/MB)