Steven D'Aprano added the comment:
In the future, please do not post screenshots, please copy and paste the text.
Screenshots are hard or impossible for the blind or visually impaired to see,
but they can use a screen reader to work with text.
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nosy: +steven.daprano
Tim Peters added the comment:
This isn't a bug. 84 appears twice in the list, the first time at index 9.
The .index() method finds the first (leftmost; smallest index) occurrence.
Since 9 isn't even, the `if` test isn't satisfied, so 84 does not appear in the
result.
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nosy:
New submission from Hyun Jae Moon:
Please check the photo attached.
This was tested on Python 3.6.0. It seems that there is a bug in list
comprehension. The list b should include 84 as well according to the code I
wrote. I believe this is a quite severe bug.
Thank you very much.
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