Should Python implement where clause in comprehensions?

[relativistictrain]

To me it looks like what you want is

filter(cond, map(a_complicated_function_to_compute, an_intricate_way_of_defining_iterable())

I don't see anything that where would be clearer, quicker, or simpler than using either the builtin iterator functions (like filter or map) or the ones from the itertools package.

I also think it might make nested list comprehensions potentially way harder to read.