View Full Version : python "remove item from list" question

10 October 2011, 02:55 PM
I can't figure out why this is wrong. What I want is to end up with just 'k' in the list. Instead I get an out of range error.

What I would expect is that it would count letters, 11 total, then cycle through them printing and removing until only k was left, but maybe the idex changes everytime an item is removed.

letters = ['a','b','c','d','e','f','g','h','i','j','k']
for i in range(10):
print ("this letter is: " + letters[i] )
print letters

Any help? Thanks for reading!

10 October 2011, 03:13 PM
every time you remove an index from that list, the list changes, and therefore indices of all the remaining items changes.

imagine you were doing this:letters.remove(letters[0])that would remove the FIRST item in the list each time, so 'a' would go first time, then 'b' (because b is now the first item), then 'c' (because c is now the first item), etc... right?

now what you are doing is:letters.remove(letters[i])so 'a' goes first, then 'c', then 'e', etc...

get it now? :)


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10 October 2011, 03:13 PM
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