shorten an if condition

[naughtysensei]

Is there a way to write this in short and clean way:

if (x == 'a') or (x == 'e') or (x == 'i') or (x == 'o') or (x == 'u'):

[deanhystad]

if x in 'aeiou':

[perfringo]

Conventional way is something like:

if x in 'aieou':
    # do something

EDIT: ninjad by deanhystad