pickle模組主要功能：

　　dump  ———— 序列化

　　load  ————— 反序列化

　　dumps

　　loads

　　ps： 不帶s的是幫你封裝write  read  更方便

　　　　load 函式可以多次執行  每次load 都是往後再讀一個物件，如果沒有了就丟擲異常 Run out of input

pickle 模組例項：　

import pickle
# 使用者註冊後得到的資料
name = "高跟"
password = "123"
height = 1.5
hobby = ["吃","喝","賭","飄",{1,2,3}]

# pickle支援python中所有的資料型別
user = {"name":name,"password":password,"height":height,"hobby":hobby,"test":3}

序列化的過程
with open("userdb.pkl","ab") as f:
    userbytes = pickle.dumps(user)
    f.write(userbytes)

反序列化過程
with open("userdb.pkl","rb") as f:
    userbytes = f.read()
    user = pickle.loads(userbytes)
    print(user)
    print(type(user))

dump 直接序列化到檔案
with open("userdb.pkl","ab") as f:
    pickle.dump(user,f)

load 從檔案反序列化
with open("userdb.pkl","rb") as f:
    user = pickle.load(f)
    print(user)
    print(pickle.load(f))
    print(pickle.load(f))
    print(pickle.load(f))