Is there a better/simpler way to filter blank lines?

[Miles]

Ben Finney wrote:
> Falcolas writes:
>
>> Using the surrounding parentheses creates a generator object
>
> No. Using the generator expression syntax creates a generator object.
>
> Parentheses are irrelevant to whether the expression is a generator
> expression. The parentheses merely group the expression from
> surrounding syntax.

As others have pointed out, the parentheses are part of the generator
syntax.  If not for the parentheses, a list comprehension would be
indistinguishable from a list literal with a single element, a
generator object.  It's also worth remembering that list
comprehensions are distinct from generator expressions and don't
require the creation of a generator object.

-Miles