Compact list

Removes falsy values from a list.

• Use filter() to filter out falsy values (False, None, 0, and "").

def compact(lst):
  return list(filter(None, lst))

compact([0, 1, False, 2, '', 3, 'a', 's', 34]) # [ 1, 2, 3, 'a', 's', 34 ]