# -*- coding: utf-8 -*- 
# Python3
import urllib
import urllib.request as url_req
opener = url_req.build_opener()
url='http://zh.wikipedia.org/wiki/'+"毛泽东"
opener.open(url).read()
# opener.open(url.encode("utf-8")).read()
# # doesn't work either

Quando o executo, reclama que:

UnicodeEncodeError: 'ascii' codec can't encode characters in position 10-12: ordinal not in range(128)

Mas eu não posso usar.encode() ou como vai reclamar:

Traceback (most recent call last):
  File "t.py", line 8, in <module>
    opener.open(url.encode("utf-8")).read()
  File "/usr/local/Cellar/python3/3.2.2/lib/python3.2/urllib/request.py", line 360, in open
    req.timeout = timeout
AttributeError: 'bytes' object has no attribute 'timeout'

Alguém sabe como lidar com isso?