With the latest version I still get three errors: test_basic_and_digest_auth_handlers, test_basic_auth, test_proxy_basic_auth, all failing here: 

  File "Lib/test/test_urllib2.py", line 990, in _test_basic_auth
    r = opener.open(request_url)
  File "/usr/local/google/home/guido/python/py3k-struni/Lib/urllib2.py", line 374, in open
    response = self._open(req, data)
  File "/usr/local/google/home/guido/python/py3k-struni/Lib/urllib2.py", line 392, in _open
    '_open', req)
  File "/usr/local/google/home/guido/python/py3k-struni/Lib/urllib2.py", line 352, in _call_chain
    result = func(*args)
  File "Lib/test/test_urllib2.py", line 363, in http_open
    "http", req, MockFile(), self.code, name, msg)
  File "/usr/local/google/home/guido/python/py3k-struni/Lib/urllib2.py", line 412, in error
    result = self._call_chain(*args)
  File "/usr/local/google/home/guido/python/py3k-struni/Lib/urllib2.py", line 352, in _call_chain
    result = func(*args)
  File "/usr/local/google/home/guido/python/py3k-struni/Lib/urllib2.py", line 831, in http_error_407
    authority, req, headers)
  File "/usr/local/google/home/guido/python/py3k-struni/Lib/urllib2.py", line 795, in http_error_auth_reqed
    return self.retry_http_basic_auth(host, req, realm)
  File "/usr/local/google/home/guido/python/py3k-struni/Lib/urllib2.py", line 801, in retry_http_basic_auth
    auth = 'Basic %s' % base64.b64encode(raw).strip()
TypeError: strip() takes exactly one argument (0 given)

Also:

(1) I'd like to see the interact_netscape call fixed rather than commented out

(2) I wonder if urllib shouldn't use text strings instead of bytes for headers and values.