On Sun, 11 Nov 2007 11:22:19 +0100, Florian Lindner wrote:
> Hello,
> I have a piece of code like that:
>
> for row in resultSet:
> logs += "/home/%s/%s/log/access.log \n" % (row[1], row[0])
> logs += "/home/%s/%s/log/error.log \n" % (row[1], row[0]) # <--
>
> Now I want to avoid the newline at the last iteration and only at the
> second line.
That means your log file doesn't end with a newline. That's often not
good, because it can confuse some tools.
Also, appending lots of strings together like that is very inefficient.
> How to do that most elegantly with Python?
If you have a small number of rows (say, less than a few tens of
thousands), you can do this:
rows = []
for row in resultSet:
rows.append("/home/%s/%s/log/access.log" % (row[1], row[0]))
rows.append("/home/%s/%s/log/error.log" % (row[1], row[0]))
# note that there are no newlines
logs = '\n'.join(rows) # do it once at the end
But again, when you write text to a file, you should end it with a
newline. It isn't compulsory, but it is best practice.
Alternatively, check out the logging module.
--
Steven.
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