def sort(self, cmp=None, key=None, reverse=False):
        """stable sort *IN PLACE*

        cmp(x, y) -> -1, 0, 1

        """
        if key is None:
            def key(i):
                return i.id
        if PY3:
            list.sort(self, key=key, reverse=reverse)
        else:
            list.sort(self, cmp=cmp, key=key, reverse=reverse)
        self._generate_index()
def sort(self, cmp=None, key=None, reverse=False):
        """stable sort *IN PLACE*

        cmp(x, y) -> -1, 0, 1

        """
        if key is None:
            def key(i):
                return i.id
        if PY3:
            list.sort(self, key=key, reverse=reverse)
        else:
            list.sort(self, cmp=cmp, key=key, reverse=reverse)
        self._generate_index()
def sort ( self , cmp = None , key = None , reverse = False ) : if key is None : def key ( i ) : return i . id if PY3 : list . sort ( self , key = key , reverse = reverse ) else : list . sort ( self , cmp = cmp , key = key , reverse = reverse ) self . _generate_index ( )
stable sort *IN PLACE*

        cmp(x, y) -> -1, 0, 1
stable sort * IN PLACE *