Python使用shelve模塊實現簡單數據存儲的方法

 　　本文實例講述了Python使用shelve模塊實現簡單數據存儲的方法。分享給大家供大家參考。具體分析如下：

　　Python的shelve模塊提供了一種簡單的數據存儲方案，以dict(字典)的形式來操作數據。

　　?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 #!/usr/bin/python import sys, shelve def store_person(db): """ Query user for data and store it in the shelf object """ pid = raw_input('Enter unique ID number:') person = {} person['name'] = raw_input('Enter name:') person['age'] = raw_input('Enter age:') person['phone'] = raw_input('Enter phone number:') db[pid] = person def lookup_person(db): """ Query user for ID and desired field, and fetch the corresponding data from the shelf object """ pid = raw_input('Enter unique ID number:') temp = db[pid] field = raw_input('Please enter name, age or phone:') field.strip().lower() print field.capitalize() + ': ', temp[field] def print_help(): print 'The avaliable commands are:' print 'store :Stores infomation about a person' print 'lookup :Looks up a person form ID number' print 'quit :Save changes and exit' print '? :Prints this message' def enter_command(): cmd = raw_input('Enter command(? for help):') cmd = cmd.strip().lower() return cmd def main(): database = shelve.open('database') # database stores in current directory try: while True: cmd = enter_command() if cmd == 'store': store_person(database) elif cmd == 'lookup': lookup_person(database) elif cmd == '?': print_help() elif cmd == 'quit': return finally: database.close() # Close database in any condition if __name__ == '__main__': main()

　　希望本文所述對大家的Python程序設計有所幫助。