结巴分词转码问题

gxl133133

#encoding:utf-8
import jieba.analyse
text = open("b.txt"
#text = "四款python中文分词系统简单测试"

for i in text:
    i = i.encode('utf-8')
    tags = jieba.analyse.extract_tags(i, 4)
    a = []
    a = "/".join(i).split('/')
    for j in a:
        print j,

Traceback (most recent call last):
  File "F:\Python27\ciku\topk.py", line 7, in <module>
    i = i.encode('utf-8')
UnicodeDecodeError: 'ascii' codec can't decode byte 0xef in position 0: ordinal not in range(12

decode('utf-8') 将utf-8转化成unicode编码
我的使用方法不对吗

已解决