func_code: def selection_sort(a):
      i = 0
      while i < len(a):
          p = i
          j = i + 1
          while j < len(a):
              if a[j] < a[p]:
                  p = j
              j += 1
          a[i], a[j] = a[j], a[i]
          i += 1
      return a