Conditional iteration

[at]

I would like to spark the discussion about the following syntax problem I
encounter.

THE PROBLEM

I have a lot times the following code:

for x in [-2, -1, 0, 1, 2, 3, 4]:
        if x > 0:
                ... more code...


It is not the addional line containing 'if x > 0:' that bothers me, but the
additional indentation.


THE SOLUTION

More pythonic in view would be:

for x in [-2, -1, 0, 1, 2, 3, 4] if x > 0:
        ... more code ...


This blends basically 

        [x for x in [-2, -1, 0, 1, 2, 3, 4] if x > 0]

and

        x = y if x > 0 else 10


EXTENDING

And maybe a few usefull variants, like:

for x in [-2, -1, 0, 1, 2, 3, 4] if x > 0 else -x:
        ... more code ...

In this case x will be 2, 1, 0, 1, 2, 3, 4.