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    <h2>Code:</h2> <pre><code>import urlparse, urllib def fixurl(url): # turn string into unicode if not isinstance(url,unicode): url = url.decode('utf8') # parse it parsed = urlparse.urlsplit(url) # divide the netloc further userpass,at,hostport = parsed.netloc.rpartition('@') user,colon1,pass_ = userpass.partition(':') host,colon2,port = hostport.partition(':') # encode each component scheme = parsed.scheme.encode('utf8') user = urllib.quote(user.encode('utf8')) colon1 = colon1.encode('utf8') pass_ = urllib.quote(pass_.encode('utf8')) at = at.encode('utf8') host = host.encode('idna') colon2 = colon2.encode('utf8') port = port.encode('utf8') path = '/'.join( # could be encoded slashes! urllib.quote(urllib.unquote(pce).encode('utf8'),'') for pce in parsed.path.split('/') ) query = urllib.quote(urllib.unquote(parsed.query).encode('utf8'),'=&amp;?/') fragment = urllib.quote(urllib.unquote(parsed.fragment).encode('utf8')) # put it back together netloc = ''.join((user,colon1,pass_,at,host,colon2,port)) return urlparse.urlunsplit((scheme,netloc,path,query,fragment)) print fixurl('http://\xe2\x9e\xa1.ws/\xe2\x99\xa5') print fixurl('http://\xe2\x9e\xa1.ws/\xe2\x99\xa5/%2F') print fixurl(u'http://Åsa:abc123@➡.ws:81/admin') print fixurl(u'http://➡.ws/admin') </code></pre> <h2>Output:</h2> <blockquote> <p><code>http://xn--hgi.ws/%E2%99%A5</code><br> <code>http://xn--hgi.ws/%E2%99%A5/%2F</code><br> <code>http://%C3%85sa:abc123@xn--hgi.ws:81/admin</code><br> <code>http://xn--hgi.ws/admin</code></p> </blockquote> <h2>Read more:</h2> <ul> <li><a href="http://docs.python.org/library/urllib.html#urllib.quote" rel="nofollow noreferrer">urllib.quote()</a></li> <li><a href="https://docs.python.org/2/library/urlparse.html#urlparse.urlparse" rel="nofollow noreferrer">urlparse.urlparse()</a></li> <li><a href="https://docs.python.org/2/library/urlparse.html#urlparse.urlunparse" rel="nofollow noreferrer">urlparse.urlunparse()</a></li> <li><a href="https://docs.python.org/2/library/urlparse.html#urlparse.urlsplit" rel="nofollow noreferrer">urlparse.urlsplit()</a></li> <li><a href="https://docs.python.org/2/library/urlparse.html#urlparse.urlunsplit" rel="nofollow noreferrer">urlparse.urlunsplit()</a></li> </ul> <h2>Edits:</h2> <ul> <li>Fixed the case of already quoted characters in the string.</li> <li>Changed <code>urlparse</code>/<code>urlunparse</code> to <code>urlsplit</code>/<code>urlunsplit</code>.</li> <li>Don't encode user and port information with the hostname. (Thanks Jehiah)</li> <li>When "@" is missing, don't treat the host/port as user/pass! (Thanks hupf)</li> </ul>
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    1. POBest way to convert a Unicode URL to ASCII (UTF-8 percent-escaped) in Python?
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    1. CONice solution, thanks. Good call about using urlparse/unparse, and noticing the case of already-quoted chars in the input. But I'm unsure why you need the split('/') logic, because urllib.quote() already considers slashes safe. See also my new, doctested, and somewhat more complete solution below.
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    2. COThe problem is that '/' is considered a path separator, while '%2F' is not. If I just unquote the string, they become one and the same. Maybe it would be better to never unquote the path at all, and encode all existing '%' as '%25'..?
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    3. COnetloc != domain, so you should parse the domain out from `user:pass@domain:port` first then convert to idna
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