how to optimize python code?

Question

I have a list of lists
Like:
l = [
["Mike", 25, 1500],
["Jane", 23, 2000],
["Mike", 25, 750],
]
and if first two elements of inner lists are same I want to merge them and sum the third element of them. Like:
res = [
["Mike", 25, 2250],
["Jane", 23, 2000],
]

This is my code:

https://code.sololearn.com/c7AQiANvinWd/?ref=app

Answer 1

Try using Sets instead! Think about it 😉