[dragonwriter]

> Better to use code that doesn't raise any questions, even if it's a few more characters.

Certainly, I agree; I would usually use:

  (x for x in xs if x)

Or, if I know more about the kind of falsy values xs actually needs removed, something more explicit like:

  (x for x in xs if x is not None)

Because Python’s multiplicity of falsy values can also be something of a footgun (particularly, when dealing with something a collection of Optionals where the substantive type has a falsy value like 0 or [] included.)

Instead of:

  filter(None, xs)

Which is terse but potentially opaque.

Though it's additional syntax, I kind of wish genexp/list/set comprehensions could use something like “x from” as shorthand for “x for x in”, which would be particularly nice for filtering comprehensions.