String concatenation vs. string formatting
John Gordon
gordon at panix.com
Fri Jul 8 16:23:52 EDT 2011
In <mailman.785.1310156331.1164.python-list at python.org> Andrew Berg <bahamutzero8825 at gmail.com> writes:
> 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.
Concatenation feels ugly/clunky to me.
I prefer this usage:
logger.error('%s could not be stored - %s' % \
(self.preset_file, sys.exc_info()[1]))
--
John Gordon A is for Amy, who fell down the stairs
gordon at panix.com B is for Basil, assaulted by bears
-- Edward Gorey, "The Gashlycrumb Tinies"
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