userdata = { "data":[]}def fil_userdata(): for i in xrange(0,5): user = {} user["name"]=... user["age"]=... user["country"]=... add_user(user)def add_user(user): userdata["data"].append(user)或更短：
def gen_user(): return {"name":"foo", "age":22}userdata = {"data": [gen_user() for i in xrange(0,5)]}# or fill separated from declaration so you can fill lateruserdata ={"data":None} # None: not initializeduserdata["data"]=[gen_user() for i in xrange(0,5)]
