Python: loop in elif condition

I'm running Python 3.

Is it possible to put a loop in the condition for elif? Here's the basic idea I'm trying to achieve. The number of items in the list is not constant.

if some_condition:
    do this
elif [ x.method() for x in list ]:
    do this to x
else:
    do something else

Now, this comes to my mind:

if some_condition:
    do this
for x in list:
    if x.method():
        do this to x
        break

But I'm trying to avoid running all the if statements, there's a lot of stuff going on in them. And I would like to get it in the elif part specifically and not in else.

Is there a way to achieve the first code example in Python without using e.g. boolean helper variables:

if some_condition:
        do this
        first_thing_happened = True
if not first_thing_happened:
    for x in list:
        if x.method():
            do this to x
            break