Python之序列化pickle

pickle是一个序列化模块。

对象序列化与文件对象

import pickle

file_name = './demo.txt'
x,y,z = 'hello1', 100, 200


with open(file_name, 'wb') as fp:
    # 对象序列化到文件对象
    pickle.dump(x, fp)
    pickle.dump(y, fp)
    pickle.dump(z, fp)

with open(file_name, 'rb') as f:
    for _ in range(3):
        # 对象反序列化，从文件读取数据
        a = pickle.load(f)
        print(f"读取到的内容：{a}, 类型为：{type(a)}")

输出打印结果如下：

读取到的内容：hello1, 类型为：<class 'str'>
读取到的内容：100, 类型为：<class 'int'>
读取到的内容：200, 类型为：<class 'int'>

对象序列化与bytes对象

import pickle

dict1 = {'aa': 11, 'bb': 22}

dict_data = pickle.dumps(dict1)
print(dict_data)

data = pickle.loads(dict_data)
print(data, type(data))


list1 = [1, 2, 3]
list_data = pickle.dumps(list1)
print(list_data)

data_list = pickle.loads(list_data)
print(data_list, type(data_list))

输出打印结果如下：

b'x80x03}qx00(Xx02x00x00x00aaqx01Kx0bXx02x00x00x00bbqx02Kx16u.'
{'aa': 11, 'bb': 22} <class 'dict'>
b'x80x03]qx00(Kx01Kx02Kx03e.'
[1, 2, 3] <class 'list'>