I find Python's list comprehensions mind-numbing in many simple cases, such as [x for x in xs if some_condition(x)] rather than just xs.filter(some_condition). We're repeating the variable name three times and zero of those times convey any useful information, and we don't find out until the very end of the line that the everything except "[", "]" and "some_condition" was ignorable.

And in cases where a data-deriving loop has so much going on directly in the loop body that it makes map/filter/reduce hard to read, there's very often some refactoring that would improve either version.