shelve模块的详细信息见Python库参考：

直接看代码：

1 # database.py 2 import sys, shelve 3  4 def store_person(db): 5     ''' 6     Query user for data and store it in the shelf object 7     ''' 8     pid = input('Enter unique ID number:') 9     person = {}10     person['name'] = input('Enter name:')11     person['age'] = input('Enter age:')12     person['phone'] = input('Enter phone:')13 14     db[pid] = person15 16 def lookup_person(db):17     '''18     Query user for ID and desired field, and fetch the corresponding data from the shelf obejct19     '''20     pid= input('Enter ID number:')21     field = input('What would you like to know?(choice option: name,age,phone):')22     field = field.strip().lower()23     print(field.capitalize()+':', db[pid][field])24 25 def print_help():26     print('The available commands are:')27     print('store   :   Stores information about a person')28     print('lookup  :   Looks up a person from ID number')29     print('quit    :   Save changes are exit')30     print('?       :   Prints this message')31 32 def enter_command():33     cmd = input('Enter command(? for help):')34     cmd = cmd.strip().lower()35     return cmd36 37 def main():38     database = shelve.open('D:\\database.dat')39     try:40         while True:41             cmd = enter_command()42             if cmd == 'store':43                 store_person(database)44             elif cmd == 'lookup':45                 lookup_person(database)46             elif cmd =='?':47                 print_help()48             elif cmd == 'quit':49                 return50     finally:51         database.close()52 53 if __name__ == '__main__':54     main()

简单交互过程：

在硬盘上产生的文件：