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Oct 5, 2012 · By using a : colon in the list index, you are asking for a slice, which is always another list. In Python you can assign values to both an individual item in a list, and to a slice of the list. I have a piece of code here that is supposed to return the least common element in a list of elements, ordered by commonality: def getSingle(arr): from collections import Counter c = Counte. 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. Nov 2, 2010 · When reading, list is a reference to the original list, and list[:] shallow-copies the list. When assigning, list (re)binds the name and list[:] slice-assigns, replacing what was previously in the list.. 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.

1) Correct 2) You can think of that one as "read only" list, where you don't care about the type of the items.Could e.g. be used by a method that is returning the length of the list. 3) T, E and U are the. and return a list of versions. Note: it seems to provide compatible releases rather than all releases. To get full list, use json approach from Eric. Mar 20, 2013 · It gets all the elements from the list (or characters from a string) but the last element. : represents going through the list -1 implies the last element of the list Official Google Search Help Center where you can find tips and tutorials on using Google Search and other answers to frequently asked questions.