字典——基础

#! /usr/bin/env python
#coding=utf-8
ab={'Swaroop':'swaroop@byteofpython.info',
     'Larry':'laryy@wall.org',
     'Matsumoto':'matz@ruby-lang.org',
     'Spammer':'spammer@hotmail.com'
}

print 'Swaroop\'s address is: %s' % ab['Swaroop']

#Adding a key/value pair
ab['Guido']='guido@python.org'

#Deleting a key/value pair
del ab['Spammer']

print '\n There are %d contacts in the address-book \n'%len(ab)

for name,address in ab.items():
    print 'Contact %s at %s'%(name,address)

if 'Guido' in ab:#或者in ab.keys()

    print '\n Guido\'s address is %s'% ab['Guido']

或：

    print '\n Guido\'s address is %(Guido)s ' % ab