# coding: utf-8 class Solution(object): # @param nestedList a list, each element in the list # can be a list or integer, for example [1,2,[1,2]] # @return {int[]} a list of integer def flatten(self, nestedList): # Write your code here if not isinstance(nestedList, list): return [nestedList] return self._flatten([], nestedList) def _flatten(self, _list, nestedList): if isinstance(nestedList, list): for i in nestedList: if isinstance(i, list): self._flatten(_list, i) else: _list.append(i) return _list # easy: http://lintcode.com/problem/flatten-list