pickle 模块

import pickle
#
class Elephant:
    def __init__(self, name, weight, height):
        self.name = name
        self.weight = weight
        self.height = height

    def tiaoxi(self):
        print(f"{self.name}大象特别喜欢调戏人")

# e = Elephant("宝宝", "185T", "175")
# e.tiaoxi()
#
# # 序列化
# bs = pickle.dumps(e) # 把对象进行序列化
# print(bs)
#
# bs = b'\x80\x03c__main__\nElephant\nq\x00)\x81q\x01}q\x02(X\x04\x00\x00\x00nameq\x03X\x06\x00\x00\x00\xe5\xae\x9d\xe5\xae\x9dq\x04X\x06\x00\x00\x00weightq\x05X\x04\x00\x00\x00185Tq\x06X\x06\x00\x00\x00heightq\x07X\x03\x00\x00\x00175q\x08ub.'
# # 发序列化
# dx = pickle.loads(bs) # 发序列化. 得到的是大象
# dx.tiaoxi()


# e1 = Elephant("宝宝", "185T", "175")
# e2 = Elephant("宝贝", "120T", "120")
# f = open("大象", mode="wb")
# # 这也是序列化
# pickle.dump(e1, f) # 没有s的这个方法是把对象打散写入到文件, 序列化的内容不是给人看的
# pickle.dump(e2, f) # 没有s的这个方法是把对象打散写入到文件, 序列化的内容不是给人看的

# f = open("大象", mode="rb")
# while 1:
#     try:
#         obj = pickle.load(f)
#         obj.tiaoxi()
#     except Exception:
#         break



# e1 = Elephant("宝宝", "185T", "175")
# e2 = Elephant("宝贝", "120T", "120")
# lst = [e1, e2]
# pickle.dump(lst, open("大象", mode="wb"))


# 读
# lst = pickle.load(open("大象", mode="rb"))
# for dx in lst:
#     dx.tiaoxi()