Python物品获取器
示例
用值将字典的键值对分组itemgetter:
from itertools import groupby from operator import itemgetter adict = {'a': 1, 'b': 5, 'c': 1} dict((i, dict(v)) for i, v in groupby(adict.items(), itemgetter(1))) #输出:{1:{'a':1,'c':1},5:{'b':5}}
与以下lambda功能等效(但更快):
dict((i, dict(v)) for i, v in groupby(adict.items(), lambda x: x[1]))
或按第二个元素,第一个元素,第二个元素对元组列表进行排序:
alist_of_tuples = [(5,2), (1,3), (2,2)] sorted(alist_of_tuples, key=itemgetter(1,0)) #输出:[(2,2),(5,2),(1,3)]