homepage

path 'g' in 'http:g' becomes '/g'.
 >>> urlsplit('http:g')
 SplitResult(scheme='http', netloc='', path='g', query='', fragment='')
 >>> urlunsplit(urlsplit('http:g'))
 'http:///g'
 >>> urlsplit('http:///g')
 SplitResult(scheme='http', netloc='', path='/g', query='', fragment='')
 >>> urljoin('http://a/b/c/d', 'http:g')
 'http://a/b/c/g'
 >>> urljoin('http://a/b/c/d', 'http:///g')
 'http://a/g'
The problematic part of the code is:
 def urlunsplit(components):
 [...]
 if netloc or (scheme and scheme in uses_netloc and url[:2] != '//'):
---> if url and url[:1] != '/': url = '/' + url
 url = '//' + (netloc or '') + url
Note also that urllib has decided on the interpretation of 'http:g' (in test).
 def test_RFC3986(self):
 [...]
 #self.checkJoin(RFC3986_BASE, 'http:g','http:g') # strict parser
 self.checkJoin(RFC3986_BASE, 'http:g','http://a/b/c/g') #relaxed parser