Re: truncating strings
On Tue, Aug 23, 2011 at 9:29 AM, Roy Smith r...@panix.com wrote:
I want to log a string but only the first bunch of it, and add ...
to the end if it got truncated. This certainly works:
log_message = message
if len(log_message) = 50:
log_message = log_message[:50] + '...'
logger.error(FAILED: '%s', '%s', %s, %s % (log_message,
route, params, e.code))
but it bugs me that there should be some cleaner way to do this. I'm
fantasizing about something along the lines of:
logger.error(FAILED: '%s{50}', '%s', %s, %s % (message,
route, params, e.code))
does anything like this exist?
You can specify a maximum width to truncate the string to, but I don't
see any built-in way to add an elision indication (e.g. ...).
%.4s % spam and eggs
'spam'
{:.4s}.format(spam and eggs)
'spam'
You could define something to wrap strings and override __format__()
or similar, but that seems like overkill.
Cheers,
Chris
--
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Re: truncating strings
On 2011-08-23, Roy Smith r...@panix.com wrote:
I want to log a string but only the first bunch of it, and add ...
to the end if it got truncated. This certainly works:
logger.error(FAILED: '%s{50}', '%s', %s, %s % (message,
route, params, e.code))
does anything like this exist?
%.50s
-s
--
Copyright 2011, all wrongs reversed. Peter Seebach / usenet-nos...@seebs.net
http://www.seebs.net/log/ -- lawsuits, religion, and funny pictures
http://en.wikipedia.org/wiki/Fair_Game_(Scientology) -- get educated!
I am not speaking for my employer, although they do rent some of my opinions.
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Re: truncating strings
Seebs wrote:
On 2011-08-23, Roy Smith r...@panix.com wrote:
I want to log a string but only the first bunch of it, and add ...
to the end if it got truncated. This certainly works:
logger.error(FAILED: '%s{50}', '%s', %s, %s % (message,
route, params, e.code))
does anything like this exist?
%.50s
That's not working in 2.7 or 3.2.
~Ethan~
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Re: truncating strings
On 2011-08-23, Ethan Furman et...@stoneleaf.us wrote:
Seebs wrote:
On 2011-08-23, Roy Smith r...@panix.com wrote:
logger.error(FAILED: '%s{50}', '%s', %s, %s % (message,
route, params, e.code))
does anything like this exist?
%.50s
That's not working in 2.7 or 3.2.
Huh.
Python 2.6.1 (r261:67515, Jun 24 2010, 21:47:49)
[GCC 4.2.1 (Apple Inc. build 5646)] on darwin
Type help, copyright, credits or license for more information.
print %.5s % (hello there, truncate me!)
hello
-s
--
Copyright 2011, all wrongs reversed. Peter Seebach / usenet-nos...@seebs.net
http://www.seebs.net/log/ -- lawsuits, religion, and funny pictures
http://en.wikipedia.org/wiki/Fair_Game_(Scientology) -- get educated!
I am not speaking for my employer, although they do rent some of my opinions.
--
http://mail.python.org/mailman/listinfo/python-list
Re: truncating strings
Seebs wrote:
On 2011-08-23, Ethan Furman et...@stoneleaf.us wrote:
Seebs wrote:
On 2011-08-23, Roy Smith r...@panix.com wrote:
logger.error(FAILED: '%s{50}', '%s', %s, %s % (message,
route, params, e.code))
does anything like this exist?
%.50s
That's not working in 2.7 or 3.2.
Huh.
Python 2.6.1 (r261:67515, Jun 24 2010, 21:47:49)
[GCC 4.2.1 (Apple Inc. build 5646)] on darwin
Type help, copyright, credits or license for more information.
print %.5s % (hello there, truncate me!)
hello
Ah -- that's only part of it -- the OP wants '...' to print as well. :)
~Ethan~
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Re: truncating strings
Seebs wrote: Python 2.6.1 (r261:67515, Jun 24 2010, 21:47:49) [GCC 4.2.1 (Apple Inc. build 5646)] on darwin Type help, copyright, credits or license for more information. print %.5s % (hello there, truncate me!) hello Well, whadda you know, I learned something new :) In any case, this doesn't solve the OP's problem, as he wants to truncate the input string, and append '...' if and only if it were truncated. The right solution is to wrap the functionality in a function. It's not hard, and is elegant. Not everything needs to be a built-in. # Untested. def truncate(s, maxwidth=50): if len(s) = maxwidth: return s s = s[:maxwidth - 3] return s + '...' -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: truncating strings
On 2011-08-23, Ethan Furman et...@stoneleaf.us wrote: Ah -- that's only part of it -- the OP wants '...' to print as well. :) O. Hmm. That's harder. I can't think of a pretty way, so I think I'd probably write a prettytrunc(string, len) or something similar. -s -- Copyright 2011, all wrongs reversed. Peter Seebach / usenet-nos...@seebs.net http://www.seebs.net/log/ -- lawsuits, religion, and funny pictures http://en.wikipedia.org/wiki/Fair_Game_(Scientology) -- get educated! I am not speaking for my employer, although they do rent some of my opinions. -- http://mail.python.org/mailman/listinfo/python-list
