Error from collections module in Python

I am getting the following errror when a python program is run

File "/home/user/Desktop/important/paper/ordereddict.py", line 1, in from collections import MutableMapping ImportError: cannot import name MutableMapping

When I tried开发者_高级运维 import collections it works fine. Please help.

I am using version Python 2.5.2

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collections.MutableMapping was introduced only in Python 2.6, so you need at least that version of Python to use your ordereddict module.

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You have to use Python 2.6 to use MutableMapping