Hrvoje Niksic:
> I'm surprised that no one has proposed a regex solution, such as:
I presume many Python programmers aren't much used in using REs.
> >>> import re
> >>> re.sub(r'\d{1,3}(?=(?:\d{3})+$)', r'\g<0>.', str(1234567))
> '1.234.567'
It works with negative numbers too. It's a very nice solution of a
simple problem that shows what you can do with REs. But I think that
RE has to be expanded & splitted (and maybe even commented) with a
VERBOSE, to improve readability, maybe somethign like:
\d {1,3}
(?= # lockahead assertion
(?: \d {3} )+ $ # non-group
)
Bye,
bearophile
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