How to merge lists element-wise to a new flat list

Question

I have 3 lists

a = [1,2,3]
b = [3,4,5]
c = [6,7,8]

I want to merge those list to a new list element-wise but have not found a way to do so. The only way I found is with zip() but then I get a tuple. But it should not be a tuple.

Desired output:

new_list = [1,3,6,2,4,7,3,5,8]

How can I achieve that?

With list(zip(a,b,c)) I get [(1,3,6),(2,4,7),(3,5,8)]. I don't want that.

Feras Alfrih · Accepted Answer · 2021-12-29T15:54:59.700

2

a = [1, 2, 3]
b = [3, 4, 5]
c = [6, 7, 8]

new_list = []
for n in range(len(a)):
    new_list.append(a[n])
    new_list.append(b[n])
    new_list.append(c[n])

print(new_list)

a more pythonic approach as @Pranav Hosangadi suggested:

a = [1, 2, 3]
b = [3, 4, 5]
c = [6, 7, 8]

new_list = []
n = 0
for x, y, z in zip(a, b, c):
    new_list.append(x)
    new_list.append(y)
    new_list.append(z)

print(new_list)

edited Dec 29 '21 at 15:54

answered Dec 29 '21 at 15:47

Feras Alfrih

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forgot to clean up last try, thanks for the notice. answer edited – Feras Alfrih Dec 29 '21 at 15:50
2

It would be more pythonic to do `for x, y, z in zip(a, b, c)` and then append `x`, `y`, and `z` instead of indexing in to the lists using `n`. – Pranav Hosangadi Dec 29 '21 at 15:50
it's a nicer approach, thanks for the information – Feras Alfrih Dec 29 '21 at 15:51
1

Thanks! This is what I wanted – Haidepzai Dec 29 '21 at 16:03
yw, i suggest using the cleaner approach by @Pranav, but i kept both to give you the freedom to choose – Feras Alfrih Dec 29 '21 at 16:07

How to merge lists element-wise to a new flat list

1 Answers1