小甲鱼 第8天 python !!泡菜

1.picking unpicking.

import pickle
pickle_file = open('city_date.pkl','wb')
pickle.dump(city,pickle_file)
pickle_file.close()

improt pickle

pickle_file = open('city_date.pkl','rb')
city=pickle.load(pickle_file)

 

try:
    检测范围
except Exception[as reason]:
    出现异常(Exception)后的处理代码
finally:
    无论如何都会被执行的代码
try:
    f=open('我为什么是一个文件.txt')
    print(f.read())
    f.close()
except OSError as reason:
    print('文件出错啦\n错误的原因是:'+str(reason))