<A Byte of Python> Chapter 16. What next?
Problem: create your own command-line address-book program using which you can add, modify, delete or search for your contacts such as friends, family and colleagues and their information such as email address and/or phone number. Details must be stored for later retrieval.
Hint. Create a class to represent the person‘s information. Use a dictionary to store person objects with their name as the key. Use the cPickle module to store the objects persistently on your hard disk. Use the dictionary built-in methods to add, delete and modify the persons.
ab = {‘Xiaopeng Yang‘: (18000001219, ‘[email protected]‘)}
del ab[‘Xiaopeng Yang‘]
class AddressBook:
‘‘‘Represents any information.‘‘‘
def __init__(self, name, phonenumber):
self.name = name
self.phonenumber = phonenumber
print ‘(Initialized AddressBook: %s)‘ %self.name
def tell(self):
‘‘‘Tell my details.‘‘‘
print ‘Name:"%s" Phone number:"%s"‘ % (self.name, self.phonenumber),
class Friend(AddressBook):
‘‘‘Represents a teacher.‘‘‘
def __init__(self, name, phonenumber, emailaddress):
AddressBook.__init__(self, name, phonenumber)
self.emailaddress = emailaddress
print ‘(Initialized Friend: %s)‘ % self.name
def tell(self):
AddressBook.tell(self)
print ‘Email address: "%s"‘ %self.emailaddress
ab[self.name] = (self.phonenumber, self.emailaddress) # add friend information to dictionary
class Family(AddressBook):
def __init__(self, name, phonenumber):
AddressBook.__init__(self, name, phonenumber)
print ‘(Initialized Family: %s)‘ % self.name
def tell(self):
AddressBook.tell(self)
ab[self.name] = (self.phonenumber,[])
print #print s blank line
class Colleague(AddressBook):
def __init__(self, name, phonenumber, emailaddress):
AddressBook.__init__(self, name, phonenumber)
self.emailaddress = emailaddress
print ‘(Initialized Colleague: %s)‘ % self.name
def tell(self):
AddressBook.tell(self)
print ‘Email address: "%s"‘ %self.emailaddress
ab[self.name] = (self.phonenumber, self.emailaddress)
print #print s blank line
f = Friend(‘Qiping Kong‘, 1590100007, ‘[email protected]‘)
a = Family(‘Haixia Li‘, 13522000000)
c = Colleague(‘Maggie Zhang‘, 13000000827,‘[email protected]‘)
print #print s blank line
members = [f, a, c]
for member in members:
member.tell() # works for Friend, Family and Colleague
if ‘Qiping Kong‘ in ab:
print ‘I am Qiping Kong, my phone numberis %d email is %s‘ % ab[‘Qiping Kong‘]
for name, (phone, email) in ab.items():
print ‘Contact %s phone number is %d, email address is %s‘ % (name, phone, email)
import cPickle as p
#import pickle as p
AddressListfile = ‘AddressList.data‘ # the name of the file where we store the information
AddressList = ab
# Write to the file
f = file(AddressListfile, ‘w‘)
c = p.dump(AddressList, f) #dump the object to a file
f.close()
del AddressList # remove the AddressList
#Read back from the storage
d = file(AddressListfile)
shoredlist = p.load(d)
print shoredlist
Output:
================ RESTART: /Users/zhouxin/Desktop/What next.py ================
(Initialized AddressBook: Qiping Kong)
(Initialized Friend: Qiping Kong)
(Initialized AddressBook: Haixia Li)
(Initialized Family: Haixia Li)
(Initialized AddressBook: Maggie Zhang)
(Initialized Colleague: Maggie Zhang)
Name:"Qiping Kong" Phone number:"1590100007" Email address: "00000[email protected]"
Name:"Haixia Li" Phone number:"13522000000"
Name:"Maggie Zhang" Phone number:"13000000827" Email address: "[email protected]"
I am Qiping Kong, my phone numberis 1590100007 email is [email protected]
Contact Maggie Zhang phone number is 13000000827, email address is [email protected]
Contact Qiping Kong phone number is 1590100007, email address is [email protected]
Contact Haixia Li phone number is 13522000000, email address is []
{‘Maggie Zhang‘: (13000000827L, ‘[email protected]‘), ‘Qiping Kong‘: (1590100007, ‘[email protected]‘), ‘Haixia Li‘: (13522000000L, [])}
>>>