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Reorder list items on your computer, go to google keep. I have a piece of code here that is supposed to return the least common element in a list of elements, ordered by commonality: 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). 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.

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. 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. 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.

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. 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.

Jan 12, 2009a list uses an internal array to handle its data, and automatically resizes the array when adding more elements to the list than its current capacity, which makes it more easy to.