Need help in extracting lines from word using python

razinzamada at razinzamada at
Tue Mar 19 15:20:57 CET 2013

I'm currently trying to extract some data between 2 lines of an input file using Python. the infile is set up such that there is a line -START- where I need the next 10 lines of code if and only if the -END- condition occurs before the next -START-. The -START- line occurs many times before the -END-. Heres a general example of what I mean:

10 lines I DONT need
10 lines I need
10 lines I dont need

.... and so on and so forth

so far I have only been able to get the -START- + 10 lines for every iteration, but am at a total loss when it comes to specifying the condition to only write if the -END- condition comes before another -START- condition. I'm a bit of a newb, so any help will be greatly appreciated.

heres the code I have for printing the -START- + 10 lines:

    in = open('input.log')
    out = open('output.txt', 'a')

    lines = in.readlines()
        for i, line in enumerate(lines):
            if (line.find('START')) > -1:
                out.write(lines[i + 1])
                out.write(lines[i + 2])
                out.write(lines[i + 3])
                out.write(lines[i + 4])
                out.write(lines[i + 5])
                out.write(lines[i + 6])
                out.write(lines[i + 7])
                out.write(lines[i + 8])
                out.write(lines[i + 9])
                out.write(lines[i + 10])

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