Finding the first occurrence of an item in a filtered Python list

finding-the-first-occurrence.md

Finding the first occurrence

If you only want the first thing that matches a condition (but you don't know what it is yet), it's fine to use a for loop (possibly using the else clause as well, which is not really well-known). You can also use

next(x for x in lst if ...)

which will return the first match or raise a StopIteration if none is found. Alternatively, you can use

next((x for x in lst if ...), [default value])

Source: https://stackoverflow.com/a/9542768/3737308