本文实例讲述了Python使用shelve模块实现简单数据存储的方法。分享给大家供大家参考。具体分析如下：
Python的shelve模块提供了一种简单的数据存储方案，以dict（字典）的形式来操作数据。
#!/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()
希望本文所述对大家的Python程序设计有所帮助。
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