import os
import pke
from spacy.lang import ja

def fn_pke(text, n=10):
    extractor = pke.unsupervised.MultipartiteRank()
    extractor.load_document(input=text, language='ja', normalization=None)
    extractor.candidate_selection(pos={'NOUN', 'PROPN', 'ADJ', 'NUM'})
    extractor.candidate_weighting(threshold=0.74, method='average')
    res = extractor.get_n_best(n=n)
    
    return "\n".join([k for k, v in res])