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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def urlopen(url, timeout=20, redirects=None):
 """A minimal urlopen replacement hack that supports timeouts for http. Note that this supports GET only."""

    scheme, host, path, params, query, frag = urlparse(url)

    if not scheme in ('http', 'https'):
        return urllib.urlopen(url)
    if params: path = '%s;%s' % (path, params)
    if query:  path = '%s?%s' % (path, query)
    if frag:   path = '%s#%s' % (path, frag)

    if scheme == 'https':
        # If ssl is not compiled into Python, you will not get an exception
        # until a conn.endheaders() call.   We need to know sooner, so use
        # getattr.
        try:
            import M2Crypto
        except ImportError:
            if not hasattr(socket, 'ssl'):
                raise RuntimeError, 'no built-in SSL Support'

            conn = TimeoutHTTPS(host, None, timeout)
        else:
            ctx = M2Crypto.SSL.Context()
            ctx.set_session_timeout(timeout)
            conn = M2Crypto.httpslib.HTTPSConnection(host, ssl_context=ctx)
            conn.set_debuglevel(1)

    else:
        conn = TimeoutHTTP(host, None, timeout)

    conn.putrequest('GET', path)
    conn.putheader('Connection', 'close')
    conn.endheaders()
    response = None
    while 1:
        response = conn.getresponse()
        if response.status != 100:
            break
        conn._HTTPConnection__state = httplib._CS_REQ_SENT
        conn._HTTPConnection__response = None

    status = response.status

    # If we get an HTTP redirect, we will follow it automatically.
    if status >= 300 and status < 400:
        location = response.msg.getheader('location')
        if location is not None:
            response.close()
            if redirects is not None and redirects.has_key(location):
                raise RecursionError(
                    'Circular HTTP redirection detected.'
                    )
            if redirects is None:
                redirects = {}
            redirects[location] = 1
            return urlopen(location, timeout, redirects)
        raise HTTPResponse(response)

    if not (status >= 200 and status < 300):
        raise HTTPResponse(response)

    body = StringIO(response.read())
    response.close()
    return body