Simon Forman schrieb:
On Aug 14, 8:22 pm, 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.
What is the pythonic way to do this ?
...
Thanks
FWIW:
def chunks(s, length=3):
stop = len(s)
start = stop - length
while start > 0:
yield s[start:stop]
stop, start = start, start - length
yield s[:stop]
s = '1234567890'
print ','.join(reversed(list(chunks(s))))
# prints '1,234,567,890'
or:
>>> def chunks(s, length=3):
i, j = 0, len(s) % length or length
while i < len(s):
yield s[i:j]
i, j = j, j + length
>>> print(','.join(list(chunks(s))))
1,234,567,890
>>> print(','.join(list(chunks(s,2))))
12,34,56,78,90
>>> print(','.join(list(chunks(s,4))))
12,3456,7890
Regards,
Gregor
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