Alright guys so I have a little problem with a nested list.
so here is my list:
a = [[1,2,3], [4,5,6], [7,8,9]] #I know that I can do for example a and that will return the first value in the first nested list but I don't know how to extract them all without having to do that for every one of them. In the end what I want is a new list like this: a = [1,2,3,4,5,6,7,8,9]
Is there a way to do this? I already tried Google but it didn't help.