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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. I have a piece of code here that is supposed to return the least common element in a list of elements, ordered by commonality:

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. Jan 27, 2012list[a:b:c], a is the starting index, b is the ending index and c is the optional step size.

This will give you a list starting at index a (inclusive) and ending at index b (exclusive). The notation list means "a list of something (but i'm not saying what)". Since the code in test works for any kind of object in the list, this works as a formal method parameter.

Nov 2, 2010when 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. Reorder list items on your computer, go to google keep.

Feb 25, 2015a list of lists would essentially represent a tree structure, where each branch would constitute the same type as its parent, and its leaf nodes would represent values. 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.

If you declare a variable named list in your module's global namespace, the interpreter will never search for that name in a higher-level namespace (that is builtins).