Python Count the number of substring in list from other string list without duplicates

Question

I have two list:

main_list = [\'Smith\', \'Smith\', \'Roger\', \'Roger-Smith\', \'42\']
master_list = [\'Smith\', \'Roger\']

I want to coun

Answer 1

A one liner

>>>sum(any(m in L for m in master_list) for L in main_list)
4

Iterate over main_list and check if any of the values from master_list are in that string. This leaves you with a list of bool values. It will stop after it finds one and so adds only one to the count for each string. Conveniently sum counts all the Trues to give you the count.