遍历列表并依次 append 每个元素到一组新列表

Question

I'm trying to iterate over a list to split it into new lists, with the elements sequentially assigned as shown below, with the first element appended to List1 , the second appended to List2 , and so on, then starting again at List1 for the fifth element, List2 for the sixth element, and so on.

Existing list:

main_list = ['apples', 'oranges', 'bananas', 'mangoes', 'kiwis', 'grapes', 'watermelon', 'tangerines', 'plums', 'dragonfruit']

Here's what I want:

list1 = ['apples', 'kiwis', 'plums']
list2 = ['oranges', 'grapes', 'dragonfruit']
list3 = ['bananas', 'watermelon']
list4 = ['mangoes', 'tangerines']

I'm sure has been asked elsewhere, but I can't seem to track it down.

Answer 1

Slice the list to get the desired results for each target:

list1 = main_list[::4]
list2 = main_list[1::4]
list3 = main_list[2::4]
list4 = main_list[3::4]

Answer 2

For something a little more dynamic and supports an n-number of lists, you can use itertools.cycle

main_list = ['apples', 'oranges', 'bananas', 'mangoes', 'kiwis', 'grapes', 'watermelon', 'tangerines', 'plums',
             'dragonfruit']

number_of_lists = 4
lists = [[] for _ in range(number_of_lists)]
cycler = cycle(lists)

for ml in main_list:
    next(cycler).append(ml)

for l in lists:
    print(l)


>>> ['apples', 'kiwis', 'plums']
>>> ['oranges', 'grapes', 'dragonfruit']
>>> ['bananas', 'watermelon']
>>> ['mangoes', 'tangerines']