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    <p>I would shorten your code to:</p> <pre><code>import sys import os from time import strftime if len(sys.argv) != 2: # if CLi does not equal to 2 commands print print ("usage:progammename.py logname.ext") sys.exit(1) logSys = sys.argv[1] newLogSys = "%s_%s.csv" % (logSys,strftime("%Y_%m_%d_ %H_%M_%S")) with open(logSys,'rb') as log, open(newLogSys,'wb') as nL: nL.writelines(lineI.replace(':' if lineI[0]=='#' else ' ', ',') for lineI in log) </code></pre> <h2>edit</h2> <p>I still don't understand what you mean by the addition of another line, that is to say '\n', to lines other than those that begin with '#'</p> <p>I ran the following code with your sample and I didn't observe something looking like what you describe. Sorry, but I can't propose any solution for a problem I don't perceive .</p> <pre><code>from time import strftime import re ss = ('--|| ||:|||:||--||| \r\n' '#10 23:30 abcdef : \r\n' '802 12:25 xyz : \r\n' '\r\n' '#:35 11:18+14:39 sunny vale : sunny sea\r\n' ' 651454451 drh:hdb 54:1\r\n' ' \r\n' ': 541514 oi:npvert654165:8\r\n' '#5415:v541564zervt\r\n' '# :: \r\n' '#::: :::\r\n' ' E\r\n') regx = re.compile('(\r?\n(?!$))|(\r?\n$)') def smartdispl(com,smth,regx = regx): print '\n%s\n%s\n%s' %\ ('{0:{fill}{align}70}'.format(' %s ' % com,fill='=',align='^'), '\n'.join(repr(el) for el in smth.splitlines(1)), '{0:{fill}{align}70}'.format('',fill='=',align='^')) logSys = 'poiu.txt' with open(logSys,'wb') as f: f.write(ss) with open(logSys,'rb') as f: smartdispl('content of the file '+logSys,f.read()) newLogSys = "%s_%s.csv" % (logSys,strftime("%Y_%m_%d_ %H_%M_%S")) with open(logSys,'rb') as log, open(newLogSys,'wb') as nL: nL.writelines(lineI.replace(':' if lineI[0]=='#' else ' ', ',') for lineI in log) with open(newLogSys,'rb') as f: smartdispl('content of the file '+newLogSys,f.read()) </code></pre> <p>result</p> <pre><code>==================== content of the file poiu.txt ==================== '--|| ||:|||:||--||| \r\n' '#10 23:30 abcdef : \r\n' '802 12:25 xyz : \r\n' '\r\n' '#:35 11:18+14:39 sunny vale : sunny sea\r\n' ' 651454451 drh:hdb 54:1\r\n' ' \r\n' ': 541514 oi:npvert654165:8\r\n' '#5415:v541564zervt\r\n' '# :: \r\n' '#::: :::\r\n' ' E\r\n' ====================================================================== ======= content of the file poiu.txt_2012_02_07_ 00_48_55.csv ======== '--||,,||:|||:||--|||,\r\n' '#10 23,30 abcdef , \r\n' '802,12:25,xyz,,:,,\r\n' '\r\n' '#,35 11,18+14,39 sunny vale , sunny sea\r\n' ',,651454451,drh:hdb,54:1\r\n' ',,,,\r\n' ':,541514,oi:npvert654165:8\r\n' '#5415,v541564zervt\r\n' '# ,, \r\n' '#,,, ,,,\r\n' ',E\r\n' ====================================================================== </code></pre>
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    1. POPython Replacing white spaces in a text file with a comma
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    1. COThanks, that's what I was looking for. Any suggestions where I can learn/read to get a good a refresher, as there is a lot of crap floating around on the web from scripters with bad habits or just bad code who think they have the right to preach..
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    2. COI just tested out your code and it works a charm, though when processing lines that contain spaces, it adds in an additional blank Line.
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    3. CO@onxx Thank you. For the first question: no, I have presently no idea about a book or an internet site where to learn to manipulate files and texts (that's what you asked, isn't it?). If I remember some reference, I will post suggestion. - Concerning the remark in the second comment, I don't understand. I tested and I didn't see any additional line added. What is your OS ? Where is the line added when you run; at the end ?
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