List Comprehension in Python.

Question

I have a Nested list in python which is structured like this..

[
[1,2,3]
[4,5,6]
[7,8,9]
]

I want to use List Comprehension specifically, to iterate over all the items in the list and add 0.1 to them and produce a new list. Any idea on how can i do that.

Answer 1

l = [
[1,2,3],
[4,5,6],
[7,8,9],
]

n = [[j+0.1 for j in i] for i in l]

It might be easier to use a numpy array though:
https://code.sololearn.com/c9ySLRIO8yFY/?ref=app

Answer 2

Oh okay. So the trick was to loop over row in the outer for loop and column in the inside. I used to get error saying inner iterator variable isn't declared. Great help ! Thank you. Solved my problem.