[Python-Dev] Replacement for print in Python 3.0 (original) (raw)
Nick Coghlan ncoghlan at gmail.com
Thu Sep 8 15:15:54 CEST 2005
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Barry Warsaw wrote:
On Wed, 2005-09-07 at 08:55, Nick Coghlan wrote:
The leading 'p' (for 'positional') is necessary to get around the fact that $1 is currently an illegal identifier in a Template That should be fixable. Ideally, 1isbetterthan1 is better than 1isbetterthanp1.
Oh, I know. I just didn't feel like cranking my brain up to the point of figuring out the necessary change to the string.Template regex. It turns out the one required change to the pattern is truly trivial though (I guess the grief we gave PEP 292 about easy customisation was actually worthwhile):
from string import Template class fmtTemplate(Template): idpattern = '[_a-z0-9]*'
def format(*args, **kwds): if kwds and (len(args) > 1): raise ValueError("Cannot use both keyword and positional arguments") fmt = fmtTemplate(args[0]) kwds.update(((str(idx), arg) for idx, arg in enumerate(args))) return fmt.substitute(**kwds)
Py> format("$1: $2", "Num bees", 0.5) 'Num bees: 0.5'
Cheers, Nick.
-- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia
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