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 = i
                  tmp = a[p]
                  a[p] = a[j]
                  a[j] = tmp
              j = j + 1
          i = i + 1