Iterating over a dictionary

Iterate over the keys of a dictionary:

In [4]: hsh = {'a': 1, 'b': 2}

In [5]: for k in hsh:
    print( k)
   ...:     
a
b

Iterate over the keys-value pairs of a dictionary:

In [1]: hsh = {'a': 1, 'b': 2}

In [2]: for k,v in hsh.iteritems():
   ...:     print( k, v)
   ...:     
a 1
b 2