For lists, the method list.index(x) returns the index in the list of the first item whose value is x. But if I want to look inside the list items, and not just at the whole items, how do I make the most Pythoninc method for this?

For example, with

l = ['the cat ate the mouse','the tiger ate the chicken','the horse ate the straw']

this function would return 1 provided with the argument tiger.

A non-slicky method:

def index_containing_substring(the_list, substring):for i, s in enumerate(the_list):if substring in s:return ireturn -1