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。