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Groups > comp.lang.python > #9093

String concatenation vs. string formatting

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Is it bad practice to use this
> logger.error(self.preset_file + ' could not be stored - ' +
> sys.exc_info()[1])
Instead of this?
> logger.error('{file} could not be stored -
> {error}'.format(file=self.preset_file, error=sys.exc_info()[1]))


Other than the case where a variable isn't a string (format() converts
variables to strings, automatically, right?) and when a variable is used
a bunch of times, concatenation is fine, but somehow, it seems wrong.
Sorry if this seems a bit silly, but I'm a novice when it comes to
design. Plus, there's not really supposed to be "more than one way to do
it" in Python.

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String concatenation vs. string formatting Andrew Berg <bahamutzero8825@gmail.com> - 2011-07-08 15:18 -0500
  Re: String concatenation vs. string formatting John Gordon <gordon@panix.com> - 2011-07-08 20:23 +0000
    Re: String concatenation vs. string formatting Ben Finney <ben+python@benfinney.id.au> - 2011-07-09 08:50 +1000
      Re: String concatenation vs. string formatting Ben Finney <ben+python@benfinney.id.au> - 2011-07-09 09:15 +1000
    Re: String concatenation vs. string formatting Thorsten Kampe <thorsten@thorstenkampe.de> - 2011-07-09 06:23 +0200
    Re: String concatenation vs. string formatting Andrew Berg <bahamutzero8825@gmail.com> - 2011-07-10 01:45 -0500
      Re: String concatenation vs. string formatting Ben Finney <ben+python@benfinney.id.au> - 2011-07-10 17:07 +1000
      Re: String concatenation vs. string formatting Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-07-10 23:42 +1000
      Re: String concatenation vs. string formatting Roy Smith <roy@panix.com> - 2011-07-10 10:33 -0400
        Re: String concatenation vs. string formatting Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-07-11 08:48 +1000
        Re: String concatenation vs. string formatting Andrew Berg <bahamutzero8825@gmail.com> - 2011-07-10 18:24 -0500
  Re: String concatenation vs. string formatting Billy Mays <noway@nohow.com> - 2011-07-08 16:57 -0400
    Re: String concatenation vs. string formatting Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-07-09 15:30 +1000
      Re: String concatenation vs. string formatting Ian Kelly <ian.g.kelly@gmail.com> - 2011-07-09 00:04 -0600
      Re: String concatenation vs. string formatting Chris Angelico <rosuav@gmail.com> - 2011-07-09 16:16 +1000
      Re: String concatenation vs. string formatting Ian Kelly <ian.g.kelly@gmail.com> - 2011-07-09 00:29 -0600
  Re: String concatenation vs. string formatting Ben Finney <ben+python@benfinney.id.au> - 2011-07-09 08:59 +1000
    Re: String concatenation vs. string formatting Andrew Berg <bahamutzero8825@gmail.com> - 2011-07-08 18:29 -0500
  Re: String concatenation vs. string formatting Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-07-09 15:12 +1000

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