I have a list of strings. I want to find the index of the string in the list which contains a substring. I am interested in the index of the very first string that contains the substring.
aa = ["hello dhimdhim", "hello chipchip", "bye bye dhundhun", "aye aye tuntun"]
In the above list, if I search for substring "dhundhun", it should return 2.
What Python function should I use?