Antoine Pitrou added the comment:
> There's an obvious need for this, CPython uses optimizations like this
> internally, as does PyPy.
I don't know if it's a need or if it's just "nice to have".
By the way, in the list case it also makes C code simpler, since once
the list is preallocated you just have to call PyList_SET_ITEM to
populate it, and there's no error return to worry about.
Also, lists are easy to pre-allocate in pure Python as well:
l = [None] * N
# populate
for i in range(N):
l[i] = ...
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue17338>
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