15-08-2009 Jan Kaliszewski <z...@chopin.edu.pl> wrote:
15-08-2009 candide <cand...@free.invalid> wrote:
Suppose you need to split a string into substrings of a given size
(except
possibly the last substring). I make the hypothesis the first slice is
at the end of the string.
A typical example is provided by formatting a decimal string with
thousands separator.
I'd use iterators, especially for longer strings...
import itertools
[snip]
Err... It's too late for coding... Now I see obvious and simpler variant:
def separate(text, grouplen=3, sep=','):
"separate('12345678') -> '123,456,78'"
textlen = len(text)
end = textlen - (textlen % grouplen)
strings = (text[i:i+grouplen] for i in xrange(0, end, grouplen))
return sep.join(itertools.chain(strings, (text[end:],)))
def back_separate(text, grouplen=3, sep=','):
"back_separate('12345678') -> '12,345,678'"
textlen = len(text)
beg = textlen % grouplen
strings = (text[i:i+grouplen] for i in xrange(beg, textlen, grouplen))
return sep.join(itertools.chain((text[:beg],), strings))
print separate('12345678')
print back_separate('12345678')
--
Jan Kaliszewski (zuo) <z...@chopin.edu.pl>
--
http://mail.python.org/mailman/listinfo/python-list
