请问 stripogram 的 html2text 功能在碰到 这样的字符的时候出错怎么解决

# -*- coding: UTF-8 -*-
import codecs,time,urllib2,re,random,sys
from stripogram import html2text, html2safehtml
reload(sys)
sys.setdefaultencoding( "utf-8" )

html = '''<div>&nbsp;<span>10月25日</span></div>'''
print html.decode("utf-8")
print html2text(html).decode("utf-8")



Traceback (most recent call last):
File "C:\Users\new 1.py", line 9, in <module>
print html2text(html).decode("utf-8")
File "C:\Python27\lib\encodings\utf_8.py", line 16, in decode
return codecs.utf_8_decode(input, errors, True)
UnicodeDecodeError: 'utf8' codec can't decode byte 0xa0 in position 0: invalid start byte