Python: Find in list

Question

I have come across this:

item = someSortOfSelection()
if item in myList:
    doMySpecialFunction(item)

but sometimes it does not work with

Answer 1

While the answer from Niklas B. is pretty comprehensive, when we want to find an item in a list it is sometimes useful to get its index:

next((i for i, x in enumerate(lst) if [condition on x]), [default value])