import os, glob, time, datetime

for dirpath,dirnames,filenames in os.walk("/var/tmp"):
    
    if len(filenames)==0 and len(dirnames)==0:
        os.system("rmdir -v {0}".format(dirpath))
        print "empty directory {0}".format(dirpath)

    for filename in filenames:
        if filename[0]==".":
            continue
        if os.path.isfile(dirpath+"/"+filename):
            mtime=datetime.datetime.fromtimestamp(os.path.getmtime(dirpath+"/"+filename))
            past=datetime.datetime.now() - datetime.timedelta(hours=24)
            if mtime<past:
                os.system("rm -v {0}".format(dirpath+"/"+filename))