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If your list of lists comes from a nested list comprehension, the problem can be solved more simply/directly by fixing the comprehension; Please see how can i get a flat result from a list … That's pretty much built into the nature of sets. ** if you're trying to, e. g. , subtract a list of dicts from another list of dicts, but the list to subtract is large, what do you do?
The first, [:], is creating a slice (normally often used for getting just part of a list), which happens to contain the entire list, and thus is effectively a copy of the list. The second, list(), is using the actual … The first way works for a list or a string; The second way only works for a list, because slice assignment isn't allowed for strings. Other than that i think the only difference is speed: It looks like it's a little … How can i collect the results of a repeated calculation in a list, dictionary etc.
Other than that i think the only difference is speed: It looks like it's a little … How can i collect the results of a repeated calculation in a list, dictionary etc. (or make a copy of a list with each element modified)?
