The colon, :, is what tells Python you're giving it a slice and not a regular index. That's why the idiomatic way of making a shallow copy of lists in Python 2 is

Oct 12, 2010 · The index or slice is passed to the methods as a single argument, and the way Python does this is by converting the slice notation, (1:10:2, in this case) to a slice object: slice(1,10,2).

Jul 19, 2015 · Whenever some other code uses slice notation on your an instance of your class Python will call your __getitem__ method with a slice object. (Older versions of Python used a __getslice__ …

To my understanding, slice means lst[start:end], and including start, excluding end. So how would I go about finding the "rest" of a list starting from an element n?

Aug 10, 2010 · 22 When slicing in Python the third parameter is the step. As others mentioned, see Extended Slices for a nice overview. With this knowledge, [::3] just means that you have not …

How to slice a list in Python Asked 16 years, 2 months ago Modified 4 years ago Viewed 205k times

Nov 23, 2019 · 108 Slicing Python slicing is an incredibly fast operation, and it's a handy way to quickly access parts of your data. Slice notation to get the last nine elements from a list (or any other …

I have a Pandas Data Frame object that has 1000 rows and 10 columns. I would simply like to slice the Data Frame and take the first 10 rows. How can I do this? I've been trying to use this: >&g...

Aug 31, 2012 · 45 Python 3 only answer (that doesn't use slicing or throw away the rest of the list, but might be good enough anyway) is use unpacking generalizations to get first and last separate from …

Python will "do the right thing" when filling in the start and stop so it iterates through the list backwards and gives you [10,9,8,7,6,5,4,3,2,1]. I've given the examples with lists, but strings are just another …