How to apply an operator sequentially to all items in a list?

I have an arbitrarily sized list:

l = [1, 2, 3, 4, 5, ...]

I want to apply the pipe operator to all items in the list, sequentially, like this:

1 | 2 | 3 | 4 | 5 # = 7

I know there is a function in the stdlib that does this, and that this question is probably a duplicate, but I don’t recall the function and can’t find answer pointing me to it.

>Solution :

You could use functools.reduce in conjunction with operator.or_.

from functools import reduce
import operator
l = [1, 2, 3, 4, 5]
res = reduce(operator.or_, l)
print(res)