func_code: def _quicksort(array):
      less = []
      greater = []
      equal = []
      if len(array) > 0:
          piv = array[0]
          less = [i for i in array if i < piv]
          greater = [i for i in array if i > piv]
          equal = [i for i in array if i == piv]
          return _quicksort(greater) + equal + _quicksort(less)
  
  
  def quicksort(array, a, b):
      array = _quicksort(array)