Manipulation the Dictionary

d={10: 'iprg' , 22: 'Nan', 33:'Kool',8: 'Jool','y': 89,'tt':'toy',7:90 }
for i in d:                                
  print i,d[i]    # printing all the values in Dictionary          
print '\n'
print d[8]  #printing values of the individual keys
print '\n'
print d['y']  #printing values of the individual keys
print '\n'
print d[7]  #printing values of the individual keys
print '\n'
d[33]='hello world'  #updating the key 33 with new value
d[22]='pythonforengineers'   #updating the key 22 with new value
for i in d:                                
  print i,d[i]    # printing all the updated values in Dictionary    
del d[10]     # deleting key:value pair using key value -> 10
print'\n Dictionary after deleting a value:\n', d
d.clear()   #clearing all values
print '\n Dictionary after clearing all values:', d
del d   # Removing the Dictionary
try:
  print d
except:
  print 'Some error has occurred'
 

Creating a dictionary and traversing

d={10: 'iprg' , 22: 'Nan', 33:'Kool',8: 'Jool' } # Creating a dictionary with key: value pair

for i in d:                                     # Here key and the vaule can be any type.
  print i,d[i]                                  # Accessing elements in the dictionary

# Order in which they display is also different in output

print d.keys()  # print all keys in a dictionary

print d.values()  # print all values in a dictionary