[EMAIL PROTECTED] wrote:
> I'm a bit baffled. Here is a bit of fairly straightforward code:
>
> def _chunkify( l, chunkSize, _curList = list() ): ...
> _chunkify simply breaks a sequence into a sequence of smaller lists of
> size <= chunkSize. The first call works fine, but if I call it
> multiple times, weirdness happens.
>
> Considering the default value of _curList, these statements should be
> identical. Any pointers? Did I miss something in the python reference
> manual? (running 2.4.3, fyi)
You've already got the real answer. How about considering iterators,
since I presume you are chunking to help some kind of processing.:
def chunky(src, size):
'''Produce a (possibly long source) in size-chunks or less.'''
assert size > 0
for start in range(0, len(src), size):
yield src[start : start + size]
def chunkify(alist, size, _curList=None):
if _curList is None:
return list(chunky(alist, size))
_curList.extend(list(chunky(alist, size)))
return _curList
I suspect most often you can use chunky directly:
for chunk in chunky(somedata, size):
...
for size in range(1, 30):
print size, list(chunky('abcdefghijklmnopqrstuvwxyz', size))
--Scott David Daniels
[EMAIL PROTECTED]
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