shelve也是python提供给我们的序列化工具，比pickle用起来更简单一些。 shelve只提供给我们一个open方法，是用key来访问的，使用起来和字典类似。例子：保存数据

 1 import shelve, datetime
 2 import os
 3 if os.path.isdir(os.getcwd() + r'\模块\shelve'):
 4     pass
 5 else:
 6     os.makedirs(os.getcwd() + r'\模块\shelve')
 7 F = shelve.open(os.getcwd() + r'\模块\shelve\shelve_text')
 8 info = {'a': 'A', 'b': 'B', 'c': 'C'}
 9 list_1 = ['abc', 1, 3, ['aa', 3.14], {4, 2.5}]
10 date = datetime.datetime.now()
11 F['info'] = info 
12 F['list_1'] = list_1
13 F['date'] = date
14 F.close()

取回数据

1 import shelve
2 F = shelve.open(os.getcwd() + r'\模块\shelve\shelve_text')
3 F.get('info')
4 #datetime.datetime(2019, 7, 29, 19, 0, 51, 338663)
5 F.get('list_1')
6 #['abc', 1, 3, ['aa', 3.14], {2.5, 4}]
7 F.close()