dictionary ----- python

Learn of dictionary,
simple example of dictionary in  “Simple Python tutorial"
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#!/usr/bin/python
# Filename:dictionary.py

# 'ab' is short for 'a'ddress'b'ook

ab = { 'Swaroop' : 'swaroop@byteofpython.info',
        'Larry'  : 'larry@wall.org',
        'Matsumoto' : 'matz@ruby-lang.org',
        'Spammer' : 'spammer@hotmail.com'  }

print "Swaroop's address is %s" %ab['Swaroop']

# delete a key->value pair

del ab['Spammer'] 

print '\nThere 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:
    print "\nGuido's address is %s" %ab['Guido']

if ab.has_key('Larry'):
    print "\nLarry's address is %s" %ab['Larry']