in python

Have the function snakecase atx take the str parameter being passed and return it in proper snake case format where each word is lowercased and separated from adjacent words via an underscore. The string will only contain letters and some combination of delimiter punctuation characters separating each word. For example: if str is "BOB lovescoding" then your program should return the string bob_loves_coding. zemples Input: "cats AVD Dogs-are Awesone" Output: cats_and_dogs_are_anefone