独立包中的nltk.util.index。
justindex的Python项目详细描述
# pip install justindex# >>> from justindex import index>>>index((len(s),s)forsin'a b'.split())defaultdict(<class'list'>, {1: ['a', 'b']})>>>index((len(s),s)forsin''.split())defaultdict(<class'list'>, {})>>>sorted(index((len(s),s)forsin'a b cc'.split()).items())[(1,['a','b']),(2,['cc'])]