做一个简单的
.keys()
>>> dct = {... "1": "a", ... "3": "b", ... "8": {... "12": "c", ... "25": "d"... }... }>>> >>> dct.keys()['1', '8', '3']>>> for key in dct.keys(): print key...183>>>如果需要排序列表：
keylist = dct.keys()keylist.sort()
