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 . 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 = . 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 .
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 . 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 . 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. Using a type .
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 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 . Closed 1 year ago. Why is the output of the following two list comprehensions different, even though f and the lambda function are the same?
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- What is the difference between list [1] and list [1:] in Python?.
- Meaning of list[-1] in Python - Stack Overflow.
- List of lists - Stack Overflow.
When reading, list is a reference to the original list, and list[:] shallow-copies the list. This indicates that "list of serial killers" should be tracked with broader context and ongoing updates.
Difference between List, List, List, List, and List. For readers, this helps frame potential impact and what to watch next.
FAQ
What happened with list of serial killers?
It gets all the elements from the list (or characters from a string) but the last element.
Why is list of serial killers important right now?
Represents going through the list -1 implies the last element of the list.
What should readers monitor next?
How do I make a flat list out of a list of lists?
Sources
- https://stackoverflow.com/questions/12745450/what-is-the-difference-between-list1-and-list1-in-python
- https://stackoverflow.com/questions/52395099/meaning-of-list-1-in-python
- https://stackoverflow.com/questions/11487049/python-list-of-lists
- https://stackoverflow.com/questions/4081561/what-is-the-difference-between-list-and-list-in-python
