From da3b7c3520b18bf5b94d99bcf8170d679051810a Mon Sep 17 00:00:00 2001 From: Mark Whiting Date: Mon, 17 Feb 2014 21:07:29 -0500 Subject: [PATCH] Better explanation of list slices Step size and list slice syntax was not quite clear. Upon seeing li[::-1] as it was previously, I was not sure what this really meant so I looked it up and found that this section of the guide may benefit from more explanation. --- python.html.markdown | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/python.html.markdown b/python.html.markdown index 15f27d37..908a0638 100644 --- a/python.html.markdown +++ b/python.html.markdown @@ -160,8 +160,12 @@ li[1:3] #=> [2, 4] li[2:] #=> [4, 3] # Omit the end li[:3] #=> [1, 2, 4] +# Select every second entry +li[::2] #=>[1,4] # Revert the list li[::-1] #=> [3, 4, 2, 1] +# Use any combination of these to make advanced slices +# li[start:end:step] # Remove arbitrary elements from a list with "del" del li[2] # li is now [1, 2, 3]