How to convert a lambda function into a regular function?

Question

a_min = [
    min(map(str.strip, x[0].split(',')),
        key=lambda i: int(str.strip(i).split('-')[-1])) for x in lst
]

I am trying to change the lambda into a regular function is there any way to do this?

Answer 1

It's simply a normal method with one argument, that return a value:

def min_key_method(i):
    return int(str.strip(i).split('-')[-1])

Usage:

a_min = [
    min(map(str.strip, x[0].split(',')), key=min_key_method) for x in lst
]