将类保存到二进制文件中 - Python

Question

我知道用c ++将类保存到二进制文件中是可能的:

file.write(Class_variable, size_of_class, amount_of_saves, file_where_to_save)

或类似的东西,我想在python中使用它,以便更容易编写和读取大量数据.

我试过这样做:

def Save_Game(player, room):
    address = 'Saves/player'

    file = open(address, 'wb')
    file.write(player)

    address = 'Saves/room'

    file = open(address, 'wb')
    file.write(room)

房间和玩家是class_objects.但它说:

TypeError: must be convertible to a buffer, not PlayerMarty

我能做什么？

Answer 1

pickle是你需要的.该pickle模块实现了一个基本但强大的算法,用于序列化和反序列化Python对象结构.这是一个例子

import pickle

class MyClass:
    def __init__(self,name):
        self.name = name
    def display(self):
        print(self.name)

my = MyClass("someone")
pickle.dump(my, open("myobject", "wb"))
me = pickle.load(open("myobject", "rb"))
me.display()

Answer 2

您可以获取 Python 对象的字节来保存和恢复它们，但直接执行并不容易。然而，标准的pickle模块极大地简化了这个过程。