python新手，求前辈们指导，谢谢·

[小耗子先森]

运行错误提示local variable 'PhoneBook' referenced before assignment，这个该如何解决，谢谢各位前辈了。

#!/usr/bin/python
# Filename: myPhoneBook2.py
# -*- coding: utf-8 -*-

import re

class PhoneBook(object):
	'''This is a phonebook.
	
	AddContact # Add contacts information
	ShowContact # Search names and show contacts
	SaveContacts # Save contacts to a TXT archive(storage mode----name: number/number)
	LoadContacts # Load contacts from the TXT archives
	'''

	def __init__(self):
	    self.contactsDict = {}
	
	def AddContact(self):
		while True:
			name = raw_input('Please input the name:')
			name = name.strip() # the name must include valid string
			if name != '':
				break
			print '***name can\' be NULL'

		while True:
			number = raw_input('Please input the number:')
			number = re.sub(r'\D', '', number)
			# if the string is not number, then clear
			if number != '':
				break
			print '***number must be digit'

		cover = True # if the contact exists, whether override or not
		if self.contactsDict.haskey(name):
			print 'the contact must exist.'
			self.ShowContact(name)
			while True:
				control = raw_input('''
				enter "c": override the original number
				enter "n": save original numbers and storage new numbers
				enter "q": exit\n>>>''')
				if control.lower() == 'n':
					cover = False
					break
				if control.lower() == 'c':
					break
				if control.lower() == 'q':
					return None
				print '***Input Error!'

			if cover:
				self.contactsDict[name] = number
			else:
				if number in self.contactsDict[name]:
					print '***Number must exist'
				else:
					self.contactsDict[name] = self.contactDict[name] + '/' + number

	def ShowContact(self, name):
		print '+++++++++++++++++++++++++++++++++++++'
		if self.contactsDict.has_key(name):
			print '[contact information]'
			print '[name: %s]' % name
			numberList = self.contactsDict[name].split('/')
			for num in range(len(numberList)):
				print '[number: %s]' % (number+1, numberList[num])

		else:
			print 'contact %s is not found' % name
		print '+++++++++++++++++++++++++++++++++++++'

	def DeleteNumber(self, name):
		if self.contactsDict.has_key(name):
			self.ShowContact(name)
			number = self.contactsDict[name].split('/')
			while True:
				print '''
			Pleasr input the contacts quene
			or enter "a" delete the contact
			or enter 'q' exit(not delete)
			(warning: if all contacts must be cleared, and also the contact's information.)'''
				control = raw_input('>>>')
				if control.lower() == 'q':
					break
				elif control.lower() == 's':
					del self.contactsDict[name]
					break
				elif control.isdigit() and int(control) <= len(number):
					del number[int(control)-1]
					self.contactsDict[name] = '/'.join(number)
					break
				else:
					print '***Input Error!'

	def LoadContacts(self):
		try:
			PhoneBook = open('PhoneBook.txt', 'a+')
			contacts = PhoneBook.read()
			if contacts == '':
				print '***Phonebook is blank.'
			else:
				ContactsList = contact.split('\n')
				for contact in ContactsList:
					if not contact == '':
						contact = contact.split('\n')
						name = contact[0]
						number = contact[1]
						self.contactsDict[name] = number
		finally:
		   PhoneBook.close()

		self.contactsDict = {line.split(':')[0]: line.split(':')[1] for line in open('PhoneBook.txt', 'a+').readlines()}

	def SaveContacts(self):
		try:
			if self.contactsDict:
				PhoneBook = open('PhoneBook.txt', 'w')
				for name, number in self.contactsDict.items():
					line = name + ':' + number
					PhoneBook.write(line)
					PhoneBook.write('\n')
			else:
				print '***Contacts information are not found!'
		finally:
		  	PhoneBook.close()


if __name__ == '__main__':
	myPhoneBook = PhoneBook()
	myPhoneBook.LoadContacts()
	try:
		while True:
			raw_input('enter HUICHE button to contine:')
			print '''
			-----------------------------------------------
				Enter a: Adds a new contact
				Enter s: Show all contacts information
				Enter d: Delete contacts
				Enter q: Exit
			-----------------------------------------------'''
			control = raw_input('>>>')
			if control.lower() == 'a':
				myPhoneBook.AddContact()
			elif control.lower() == 's':
				name = raw_input('Please input the contact you want to find.\n>>>')
				myPhoneBook.ShowContact(name)
			elif control.lower() == 'd':
				name = raw_input('Please input the contacts\' name you want to delete.\n>>>')
				myPhoneBook.DeleteNumber(name)
			elif control.lower() == 'q':
				break
			else:
				print '***Input Error!'
	finally:
		myPhoneBook.SaveContacts()

[爱爬山的IT小小鸟]

1. PhoneBook 应改成全局变量

def LoadContacts(self):
        global PhoneBook  # 全局变量
        try:
            PhoneBook = open('PhoneBook.txt', 'a+')
            contacts = PhoneBook.read()
            if contacts == '':
                print '***Phonebook is blank.'
            else:
                ContactsList = contact.split('\n')
                for contact in ContactsList:
                    if not contact == '':
                        contact = contact.split('\n')
                        name = contact[0]
                        number = contact[1]
                        self.contactsDict[name] = number
        finally:
            PhoneBook.close()

        self.contactsDict = {line.split(':')[0]: line.split(':')[1] for line in open('PhoneBook.txt', 'a+').readlines()}

    def SaveContacts(self):
        global PhoneBook  # 全局变量
        try:
            if self.contactsDict:
                PhoneBook = open('PhoneBook.txt', 'w')
                for name, number in self.contactsDict.items():
                    line = name + ':' + number
                    PhoneBook.write(line)
                    PhoneBook.write('\n')
            else:
                print '***Contacts information are not found!'
        finally:
            PhoneBook.close()

2. 错误第36行

        if self.contactsDict.haskey(name):
        是has_key 而不是 haskey
        if self.contactsDict.has_key(name):