Python list, remembering the first item, even after list has been deleted

Question

I'm doing a robotic competition and I had a simple request.

This is a simplified analogue of what I have:

import random


dumping_list=[]
while True:
    markers = [#a list that could range in length from many to no elements]


    if len(markers) != 0:
        #do some stuff


    elif len(markers) == 0:
        dumping_list.append(markers[0])

Now my question is, how can make the markers[0] in the elif refer to the markers[0] the last time that it contained something, how do I go about that?

Any help would be brilliant! Thanks

You could just grab the last item from dumping list, if you know that was the first element of the last list? dumping_list[-1] — Bryan, Apr 13 '13 at 20:50

score 0 · Answer 1 · answered Apr 13 '13 at 20:50

I'm not sure if I understand what you're trying to accomplish here, but I think that could help

import random
dumping_list=[]
last_makers = None

while True:
    markers = [#a list that could range in length from many to no elements]


    if len(markers) != 0:
        #do some stuff
        last_maker = makers[0]


    elif len(markers) == 0:
        if last_makers:
            dumping_list.append(last_makers)

Python list, remembering the first item, even after list has been deleted

1 Answers1