I am wondering if it is possible to start reading from the last line of file, and then the last but one up to the first line.
If you can afford to keep the whole file in memory, than:
lines = open(..).readlines() print lines[::-1]
Otherwise you can use seek() to random-access file and read chunks,
then extract lines from them and process them.
See http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/120686 for implementation details.
Mike
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