I am curious to know why my following code does not work. If you know python well please PM or post, it would be very appreciated.



again, help is appreciated.

even = [i for i in myList if not i%2]

The point of my function that I'm doing is to use recursion and not use for loops in any way unfortunately - otherwise I would be able to use that. I am trying to figure out why this part of my code is not working though:

even = mylist[:n/2]

This post was edited by SleepyUnit on Jun 29 2014 02:34pm

Without actually testing it, I think what you want is mylist[::n/2]

Just trying to make it so even = [0,2,4], or every even element in the list elements.

Since I cannot do any looping, I modify a new list to be [0,2,4,5,3,1] from the original [0,1,2,3,4,5].

Then I will assign even to [0,2,4] and odd to [1,3,5].

I'll try out your suggestion though

The syntax [::x] means to get every element starting at index 0 ending at index x, which I think is what you want after reordering the array.

My bad on the first suggestion I didn't really understand the scope of your problem. I also think you might want (n/2)-1? I'm not really a python expert I've only ever played with it a few times

No don't think it's working sadly.. Thanks for the help though

Just ran a quick test:



This printed an array of [0,2,4]


EDIT: That was python2 code, if using python3 it appears that python3 doesn't like math in the list slicing syntax, so I had to store another variable off:


firstHalf = n/2

even = newElements[:firstHalf]

This post was edited by mebeatyou on Jun 29 2014 03:31pm

ohhh lol thank you. never thought about different of python2 and python3. I am fairly new to python

I'll try that now

edit: the gods hate me. still not working

This post was edited by SleepyUnit on Jun 29 2014 03:46pm

If you wanna post full code here I can try and run it myself and see if I can help you debug