Python 中可以使用 pickle 模块将对象转化为文件保存在磁盘上,在需要的时候再读取并还原。用法如下:
pickle.dump(obj, file[, protocol])
这是 pickle 将对象持久化的方法,参数具体含义如下:
pickle保存字典的简单例子:
import pickle
a_dict = {'da':121, 'db':122, 'dc':123}
file = open('./pickle_example.pickle', 'wb')
pickle.dump(a_dict, file)
file.close()
对象被pickle模块持久化后,可用pickle.load方法还原。用法如下:
pickle.load(file)
pickle提取刚才保存的pickle_example.pickle文件对象内容:
# reload a file to a variable
with open('pickle_example.pickle', 'rb') as file:
a_dict1 =pickle.load(file)
print(a_dict1) # 输出 {'db': 122, 'dc': 123, 'da': 121}
Python中使用pickle持久化对象 pickle 保存数据