###資料持久化儲存

- 說明：持久化儲存方案，普通檔案、資料庫、序列化

- 示例：

  ```python
  import pickle

  class Person:
      def __init__(self, name, age):
          self.name = name
          self.age = age

      def __str__(self):
          return 'name:{} age:{}'.format(self.name, self.age)
     
     
  xiaoming = Person('
 
xiaoming', 20)
  # print(xiaoming)

  # 序列化：會將物件轉換為bytes
  # s = pickle.dumps(xiaoming)
  # print(s)

  # 反序列化：從bytes中解析出物件
  # xm = pickle.loads(s)
  # print(xm, type(xm)) 

  # 直接儲存到檔案
  # fp = open('data.txt', 'wb')
  # pickle.dump(xiaoming, fp)
  # fp.close()

  # 從檔案中讀取物件
  fp = open('data.txt', '
 
rb')
  xm = pickle.load(fp)
  print(xm, type(xm))