How to sort a 2D list of strings by length in python?

Question

I have a 2D list in python which contains first and last names of different people. It looks like this :
teachers=[["Rachelle", "Goodyear"],["Mike","Anderson"], ["Jeremy","Smith"]]
And I want to sort them by the length of their last name.
I've tried different solutions but it always sort by their first name ... Please help me. Thank you.

Riccardo Bucco · Answer

Here is a possible solution:
sorted_teachers = sorted(teachers, key=lambda x: len(x[1]))

How to sort a 2D list of strings by length in python?

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