python pickle读取变量

pickle

 

 

# 存储变量的文件的名字
filename = 'Day3-Data.data'

if os.path.exists(filename):
    print("Already exist")
    with open(filename, 'rb') as load_data:
        r = pickle.load(load_data)# 加载数据
else:
    Data = Data()
    r = Data.getData(url=r'https://adventofcode.com/2020/day/3/input')
    with open(filename, 'wb') as save_data:
        pickle.dump(r, save_data)# 写入数据