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

print(ab['Swaroop'])
del ab['Larry']
print(ab)
