>>> import pwb, pywikibot as py
>>> s = py.Site()
>>> p = py.Page(s, u'Brägel')
>>> p.title(as_url=True)

Traceback (most recent call last):
  File "<pyshell#25>", line 1, in <module>
    p.title(as_url=True)
  File "pywikibot\tools\__init__.py", line 1738, in wrapper
    return obj(*__args, **__kw)
  File "pywikibot\page.py", line 367, in title
    title = quote_from_bytes(encoded_title, safe='')
  File "C:\Python27\lib\urllib.py", line 1297, in quote
    if not s.rstrip(safe):
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 2: ordinal not in range(128)
>>>