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POLoop within loop python
 

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    <p>I have a log file with several hundred thousand lines. </p> <p>I am looping through these lines to find any line with some specific text, for example: <code>!!event!!</code>.<br> Then, once an <code>!!event!!</code> line is found, I need to continue looping after this <code>!!event!!</code> line until I find the next 3 lines which contain their own specific text <code>('flag1', 'flag2', and 'flag3')</code>.<br> Once I find the third line <code>('flag3')</code>, I then want to continue looping for the next <code>!!event!!</code> line and repeat the former process until there are no more events. </p> <p>Does anyone have suggestions on ways I structure my code to accomplish this? </p> <p>For example: </p> <pre><code>f = open('samplefile.log','r') for line in f: if '!!event!!' in line: L0 = line #then get the lines after L0 containing: 'flag1', 'flag2', and 'flag3' # below is a sample log file #I am not sure how to accomplish this #(I am thinking a loop within the current loop) #I know the following is incorrect, but the intended result would be able to yield something like this: if "flag1" in line: L1 = line.split() if "flag2" in line: L2 = line.split() if "flag3" in line: L3 = line.split() print 'Event and flag times: ', L0[0], L1[0], L2[0], L3[0] </code></pre> <p>samplefile.log</p> <pre><code>8:41:05 asdfa 32423 8:41:06 dasd 23423 8:41:07 dfsd 342342 8:41:08 !!event!! 23423 8:41:09 asdfs 2342 8:41:10 asdfas flag1 8:41:11 asda 42342 8:41:12 sdfs flag2 8:41:13 sdafsd 2342 8:41:14 asda 3443 8:41:15 sdfs 2323 8:41:16 sdafsd flag3 8:41:17 asda 2342 8:41:18 sdfs 3443 8:41:19 sdafsd 2342 8:41:20 asda 3443 8:41:21 sdfs 4544 8:41:22 !!event!! 5645 8:41:23 sdfs flag1 8:41:24 sadfs flag2 8:41:25 dsadf 32423 8:41:26 sdfa 23423 8:41:27 sdfsa flag3 8:41:28 sadfa 23423 8:41:29 sdfas 2342 8:41:30 dfsdf 2342 </code></pre> <p>the code from this sample should print:</p> <pre><code>Event and flag times: 8:41:08 8:41:10 8:41:12 8:41:16 Event and flag times: 8:41:22 8:41:23 8:41:24 8:41:27 </code></pre>
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    1. COSuggestion: feed the lines to a FSM (finite state machine) that has states like find_event, find_flag1, etc.
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    2. COYou should use regular expressions to do this. If you show me some sample input and what you want to do with it I can teach you how.
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      1. USIonut Hulub
 

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