divide a list into three separate list

def divide(aList):
  a = []
  b = []
  c = []
  for x in aList:
    if x < 0:
      a.append(x)
    elif x == 0:
      b.append(x)
    else:
      c.append(x)
  return a, b, c

divide([1, 2, -1, 0, -2, 3])