I'd like to propose the following addition to itertools: A function
itertools.getitem() which is basically equivalent to the following
python code:
_default = object()
def getitem(iterable, index, default=_default):
try:
return list(iterable)[index]
except IndexError:
if default is _default:
raise
return default
but without materializing the complete list. Negative indexes are
supported too (this requires additional temporary storage for abs(index)
objects).
The patch is available at http://bugs.python.org/1749857
Servus,
Walter
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