Replace beginning of a list with values from another list

Question

For the lists A and B below:

A=[8, 4, 5]

B=[0,0,0,0,0,0,0,0,0,0]

I would like to combine them to give 'C':

C=[8,4,5,0,0,0,0,0,0,0]

Code I have tried:

C = [B(x) for x in A else 0 for x in B]

But I recieve a syntax error.

Can someone help with the correct syntax to achieve the 'Desired Output'. Thankyou.

What should happen if the values in `B` are not zeros? Do you simply replace them or add them? — Georgy, Aug 21 '20 at 14:32
Does this answer your question? [Replacing a sublist with another sublist in python](https://stackoverflow.com/questions/12898023/replacing-a-sublist-with-another-sublist-in-python) — Georgy, Aug 21 '20 at 14:54

score 1 · Accepted Answer · answered Aug 21 '20 at 14:36

1

Do you mean?

C = A + B[len(A):]

Am I missing something here?

answered Aug 21 '20 at 14:36

kfkhalili

score 1 · Answer 2 · answered Aug 21 '20 at 14:40

1

I am not sure what you mean with combine. If you want to add the lists elementwise I would recommend using numpy:

import numpy as np

a = np.array([1,2,3])
b = np.array([4,5,6])
c = a + b

answered Aug 21 '20 at 14:40

Jonas

score 1 · Answer 3 · answered Aug 21 '20 at 14:55

1

You can also try this.

C = [*A, *B]

answered Aug 21 '20 at 14:55

Allwin

3 Answers3