Serhiy Storchaka <storchaka+cpyt...@gmail.com> added the comment:
It is expected behavior. Your code is equivalent to:
_result = []
for i in your_list:
_result.append(your_list.append(i))
which is equivalent to:
_result = []
_j = 0
while _j < len(your_list):
i = your_list[_j]
_result.append(your_list.append(i))
_j += 1
It is an infinite loop (because len(your_list) is increased after
your_list.append(i)), and two lists grow with every iteration.
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nosy: +serhiy.storchaka
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue45579>
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