On Saturday, March 22, 2014 2:12:53 AM UTC+5:30, vasudevram wrote: > Hi list,
> Can anyone - maybe one of the Python language core team, or someone with > knowledge of the internals of Python - can explain why this code works, and > whether the different occurrences of the name x in the expression, are in > different scopes or not? : > x = [[1,2], [3,4], [5,6]] > [x for x in x for x in x] > I saw this on a Hacker News thread about Python, and here is a post I wrote > that gives more details about it, including relevant links, how I found that > it can be extended to a triply-nested list, and my thoughts about the scope > issue: > http://jugad2.blogspot.in/2014/03/flatten-list-of-lists-with-list.html > A few people commented about it, both on my blog, and on the Python Reddit > where I also submitted my post, but I'm not sure I'm convinced of their > reasoning or understand it, hence posting the question here. Lets try without comprehending comprehensions :-) >>> x=[[1,2],[3,4]] >>> for x in x: ... for x in x: ... print x ... 1 2 3 4 >>> -- https://mail.python.org/mailman/listinfo/python-list
