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15887546
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2013-04-08T19:44:21.313
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2013-04-08T20:43:11.793
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This should do what you need. Put file with this code in the directory where you have your <code>.log</code> files, replace <code>KEYWORD</code> with what you are actually looking for, and run it. <pre><code>import os theKeyword = 'KEYWORD' directory = '.' with open('output.csv', 'w') as out: for file in os.listdir(directory): if file.endswith(".log"): with open(file, 'r') as f: for line in f: if theKeyword in line: out.write(line) </code></pre> As suggested, you can use <a href="http://docs.python.org/2/library/glob.html" rel="nofollow"><code>glob</code></a> instead of <a href="http://docs.python.org/2/library/os.html#os.listdir" rel="nofollow"><code>os.listdir</code></a>: <pre><code>from glob import glob with open('output.csv', 'w') as out: for file in glob('*.log'): with open(file, 'r') as f: for line in f: if 'KEYWORD' in line: out.write(line) </code></pre> The code can be even a bit simpler if you use <a href="http://docs.python.org/2/library/fileinput.html" rel="nofollow"><code>fileinput</code></a> module: <pre><code>from glob import glob import fileinput with open('output.csv', 'w') as out: for line in fileinput.input(glob('*.log')): if 'KEYWORD' in line: out.write(line) </code></pre> Another variation of the 'grep in Python' thing: <pre><code>from glob import glob import fileinput with open('output.csv', 'w') as out: out.writelines(line for line in fileinput.input(glob('*.log')) if 'KEYWORD' in line) </code></pre> In the above snippet, if you remove <code>fileinput.input</code>'s argument, then it will process <code>sys.argv[1:]</code>, so you can run your script with file names as parameters. In case you'd like to search for files recursively in subdirectories of a directory, you should have a look at <a href="http://docs.python.org/2/library/os.html#os.walk" rel="nofollow"><code>os.walk</code></a> function. If you have a Linux/Unix/Mac box, or if you have <a href="http://www.cygwin.com/" rel="nofollow">Cygwin</a> installed on a Windows box, the same can be achieved a bit easier using shell tools: <pre><code>$ cat *.log| grep KEYWORD >output.csv </code></pre>
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