[['19'], ['19', '21']] convert this to [19,19,21] in python

Question

How can I remove the list inside list(Double Square Brackets) and make it as list of type integer.

I tried choosing one element at a time:

enter code here
x = [['19'], ['19', '21']]
x = (int(x) for x in x)

But instead it results in <generator object>.

You want to _flatten a nested list_. – roganjosh Jan 28 '18 at 16:53 — roganjosh, Jan 28 '18 at 16:53

score 0 · Answer 1 · answered Jan 28 '18 at 16:53

0

If you add the lists together you will get your desired result like:

sum(x, [])

x = [['19'], ['19', '21']]

print(sum(x, []))

['19', '19', '21']

answered Jan 28 '18 at 16:53

Stephen Rauch

score 0 · Answer 2 · answered Jan 28 '18 at 16:58

0

All you need is:

final_list = [i for sub_list in x for i in sub_list]

answered Jan 28 '18 at 16:58

Austin

2 Answers2