一个集合去掉另一个集合中的内容，可以用来去停用词

#-*- encoding:utf-8 -*-

a = ['北京','附近','的','租房']
b = ['附近','的']

print ",".join(a)
print ",".join(b)
print ",".join(set(a)-set(b))

#-*- encoding:utf-8 -*-
import jieba
import jieba.analyse

#stopwords = {}.fromkeys([ line.rstrip() for line in open('stopword.txt') ])
stopwords = {}.fromkeys(['的', '附近'])
segs = jieba.cut('北京附近的租房', cut_all=False)
segs = [w.encode('utf8') for w in list(segs)] #特别注意此处转换,但是转换出来的包含u，表示Unicode编码
stopwords = list(stopwords)
print segs
print stopwords
fenci_key=",".join(list(set(segs)-set(stopwords)))
print fenci_key