python iteration

m = {'a': 1, 'b': 2, 'c': 3, 'd': 4}
 for k, v in m.iteritems():
 print '{}: {}'.format(k, v)
a: 1
c: 3
b: 2
d: 4

a = ['Hello', 'world', '!']
for i, x in enumerate(a):
  print '{}: {}'.format(i, x)

0: Hello
1: world
2: !

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