Explanation of this Python language feature? [x for x in x for x in x] (to flatten a nested list)

[alex23]

On 25/03/2014 12:39 PM, Mark H Harris wrote:
> my version semantically is "how it is perceived" by the user

Could you please stop claiming to have insight into the comprehension of 
anyone other than yourself? Hasty generalisations don't help your argument.