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pythonpython-3.xlistpython-itertools

Python list iteration exhaustion

How do i iterate over two lists simultaneously, One list is bigger than the second one. So the second one exhausts. I want to start the smaller list again till the bigger one exhausts

_list = [ 19 , 74, 544, 39, 00, 34, 44, 593, 33, 2123, 22]
_list1 = [0, 1, 2, 3, 4]

Things i have tried:

I used itertools.zip_longest but i don't know what to use in fillvalue.

Needed Output:

The output i desire : (19, 0), (74, 1) ----- (34, 5) (44, 0) (593, 1) until the bigger list exhausts.

Solution

  • One list is bigger than the second one. So the second one exhausts. I want to start the smaller list again till the bigger one exhausts

    You might combine itertools.cycle and zip following way

    import itertools
li1 = [19, 74, 544, 39, 00, 34, 44, 593, 33, 2123, 22]
li2 = [0, 1, 2, 3, 4]
for i in zip(li1, itertools.cycle(li2)):
    print(i)

    output

    (19, 0)
(74, 1)
(544, 2)
(39, 3)
(0, 4)
(34, 0)
(44, 1)
(593, 2)
(33, 3)
(2123, 4)
(22, 0)