The second, list(), is using the actual list type constructor to create a new list which has contents equal to the first list. Oct 5, 2012 · By using a : colon in the list index, you are asking for a slice, which is always another list. When assigning, list (re)binds the name and list[:] slice-assigns, replacing what was previously in the list. Using a type parameter (like in your point 3), requires that the type parameter be declared. The notation List<?> means "a list of something (but I'm not saying what)". In Python you can assign values to both an individual item in a list, and to a slice of the list. Try it yourself with timeit. timeit () or preferably timeit. g. Nov 2, 2010 · When reading, list is a reference to the original list, and list[:] shallow-copies the list.

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