func_code: def reverse(a):
      i = 0
      j = len(a) - 1
      while i < len(a) / 2:
          tmp = a[i]
          a[i] = a[j]
          a[j] = tmp
          i = i + 1
          j = j - 1
annotation: def reverse(a):
      i = 0
      j = len(a) - 1
      while i < len(a) / 2:
          tmp = a[i]
          a[i] = a[j]
          a[j] = tmp
          i = i + 1
          j = j - 1
      return a
  