> python
Python 2.6.5 (r265:79096, Mar 19 2010, 21:48:26) [MSC v.1500 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> d = dict()
>>> d['a'] = 100
>>> d['z'] = 200
>>> d['b'] = 300
>>> d.keys()
['a', 'z', 'b']

('A`)