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32 lines
625 B
Python
32 lines
625 B
Python
#!/usr/bin/env python
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__author__ = "bt3"
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from collections import OrderedDict
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def OrderedDict_example():
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''' show some examples for OrderedDict '''
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''' keep the order of insertion.
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maintains a doubly linked list, so size is more than twice than normal dict'''
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pairs = [('a', 1), ('b',2), ('c',3)]
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d1 = {}
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for key, value in pairs:
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if key not in d1:
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d1[key] = []
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d1[key].append(value)
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for key in d1:
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print(key, d1[key])
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d2 = OrderedDict(pairs)
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for key in d2:
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print(key, d2[key])
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if __name__ == '__main__':
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OrderedDict_example()
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