Replacing element in a list in Python

Question

I have two lists. I want to replace J[0][0] with Leftover[0]. I present the current and expected outputs.

Leftover = [1]
J = [[0, 0, 7, 9, 10]]

for i in range(len(J)):
    J[0][Leftover[0]] = 1

print(J)

The current output is

[[0, 1, 7, 9, 10]]

The expected output is

[[1,0,7,9,10]]

Does this answer your question? Replacing elements in a list, Python — Destroy666
– Destroy666, Commented May 22, 2023 at 20:21

saidtheflux · Accepted Answer · 2023-05-19 10:02:57Z

1

You do not need to use a loop for doing this :)

Leftover = [1]
J = [[0, 0, 7, 9, 10]]

J[0][0] = Leftover[0]

answered May 19, 2023 at 10:02

saidtheflux

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