看了一些基础的 Python 入门教程后，深深感觉到 Python 的简洁与强大，这是我的第一个 Python Demo。以下是完整代码与运行截图。

代码：

# encoding: utf-8
'''
@author: Techzero
@email: techzero@163.com
@time: 2014-4-30 下午1:31:04
'''
import os
import sys
import cPickle as p

class Person:
	def __init__(self, name, email):
		'''Initializes the person's data.'''
		self.name = name
		self.email = email

def create():
	"""Create new person and input email"""
	global Persons
	try:
		name = raw_input("Please input name:")
		while Persons.has_key(name):
			name = raw_input("This name has already exist, please input new name:")
		email = raw_input("Please input Email:")
	except EOFError:
		print '\nEOF Error'
		sys.exit()
	Persons[name] = email
	print ""

def delete():
	"""Search person by name and delete"""
	global Persons
	try:
		name = raw_input("Please input the person's name you want to delete:")
	except EOFError:
		print '\nEOF Error'
		sys.exit()
	if Persons.has_key(name):
		del Persons[name]
		save()
	else:
		print "No one called",name,"!\n"

def modify():
	"""Search person by name and modify email"""
	global Persons
	try:
		name = raw_input("Please input the person's name you want to modify:")
		if Persons.has_key(name):
			del Persons[name]
			email = raw_input("Please input new email:")
			Persons[name] = email
			save()
		else:
			print "No one called",name,"!\n"
	except EOFError:
		print '\nEOF Error'
		sys.exit()

def save():
	"""Save Persons to file"""
	global Persons
	File = 'person.dat'
	f = file(File, 'w')
	p.dump(Persons, f)
	f.close()
	print "Operation Done!\n"

def read():
	"""Read person from file"""
	global Persons
	File = 'person.dat'
	if os.path.exists(File):
		f = file(File)
		Persons = p.load(f)
		f.close()
	else:
		File = 'person.dat'
		f = file(File, 'w')
		f.close()

def display():
	"""Display all persons in the dictionary"""
	global Persons
	for name, email in Persons.items():
		print "		",name,email
	print ""

def search():
	"""Search person by name"""
	global Persons
	try:
		name = raw_input("Please input the person's name you want to search:")
	except EOFError:
		print '\nEOF Error'
		sys.exit()
	if Persons.has_key(name):
		print "		",name,Persons[name],"\n"
	else:
		print "No one called",name,"!\n"

def menu():
	"""Display a menu to choose operation"""
	choose = "0"
	while True:
		#i = os.system("cls")
		print'''1----Create
2----Delete
3----Modify
4----Search
5----Display
6----Exit'''
		try:
			choose = raw_input("Please choose an item(1-6):")
		except EOFError:
			print '\nEOF Error'
			sys.exit()
		if choose == "1":
			create()
		elif choose == "2":
			delete()
		elif choose == "3":
			modify()
		elif choose == "4":
			search()
		elif choose == "5":
			display()
		elif choose == "6":
			print "Thanks for using!"
			sys.exit()
		else:
			print ""

Persons = {}
read()
menu()

运行截图