python 元组

ab={
        'Swaroop'   :'swaroopch@bytoofpython.info',
        'Larry'     :'larry@wall.org',
        'Matsumoto' :'matz@ruby-lang.org',
        'Spammer'   :'spammer@hotmail.com'
    }
print("Swaroop's address is %s"%ab['Swaroop'])
ab['Guido']='guido@python.org'
del ab['Spammer']
print('
There are %d contacts in the address-book
'%len(ab))
for name,address in ab.items():
    print('Contact %s at %s'%(name,address))
if 'Guido' in ab:
    print("
Guido's address is %s"%ab['Guido'])