Python体验(04)字典dictionary

#!/usr/bin/python
#filename:dict.py

#'ab' is communication book
ab = {
'Bill':'billgates@microsoft.com',
'Kaifu-LEE':'kaifu-lee@google.com',
'Minghui':'minghui@lypower.com'
}

print "\nThere are %d contacts in the address-book:"%len(ab)
for name,email in ab.items():#index all the elements
        print '\t%s\t\t\t%s'%(name,email)
print "Bill's email address is %s"%ab['Bill']#index by key

print "\nAdd Lei-che's address: ab['Lei-che'] = 'chelei@zhenghai.com' "
ab["Lei-che"] = 'chelei@zhenghai.com' #append a dictionary
print "There are %d contacts in the address-book:"%len(ab)
for name,email in ab.items():#index all the elements
        print '\t%s\t\t\t%s'%(name,email)

print "\nKill Kaifu-LEE's information: del ab['Kaifu-LEE']"
del ab['Kaifu-LEE'] #del a dict
print "There are %d contacts in the address-book:"%len(ab)
for name,email in ab.items():#index all the elements
        print '\t%s\t\t\t%s'%(name,email)

#--==-----------the output is below -------==--
#There are 3 contacts in the address-book:
#        Kaifu-LEE                       kaifu-lee@google.com
#        Bill                    billgates@microsoft.com
#        Minghui                 minghui@lypower.com
#Bill's email address is billgates@microsoft.com

#Add Lei-che's address: ab['Lei-che'] = 'chelei@zhenghai.com'
#There are 4 contacts in the address-book:
#        Lei-che                 chelei@zhenghai.com
#        Kaifu-LEE                       kaifu-lee@google.com
#        Bill                    billgates@microsoft.com
#        Minghui                 minghui@lypower.com

#Kill Kaifu-LEE's information: del ab['Kaifu-LEE']
#There are 3 contacts in the address-book:
#        Lei-che                 chelei@zhenghai.com
#        Bill                    billgates@microsoft.com
#        Minghui                 minghui@lypower.com