How to use the distlib.compat.urljoin function in distlib

def get_distribution_names(self):
        return json.loads(
            http_retrieve(self.opener,
                compat.urljoin(self.url, 'api'))[0].data)

raise TooManyRedirects('Too many redirects')

    # Params to be passed to request. The `preload_content` must be set to
    # False, otherwise `read()` wont honor `decode_content`.
    params = {
        'headers': util.get_auth_info_from_url(url),
        'preload_content': False,
        'redirect': False,
    }

    # Request the url and ensure we've reached the final location
    response = pool.request('GET', url, **params)
    if 'location' in response.headers:
        location = response.headers['location']
        if location.startswith('/'):
            url = compat.urljoin(url, location)
        else:
            url = location
        return http_retrieve(pool, url, attempt=attempt + 1)
    return response, url

def _get_project(self, name):
        # It sounds lame, but we're trying to match requirements with more than
        # one word separated with either `_` or `-`. Notice that we prefer
        # hyphens cause there is currently way more packages using hyphens than
        # underscores in pypi.p.o. Let's wait for the best here.
        options = [name]
        if '-' in name or '_' in name:
            options = (name.replace('_', '-'), name.replace('-', '_'))

        # Iterate over all the possible names a package can have.
        for package_name in options:
            url = compat.urljoin(self.base_url, '{0}/'.format(
                compat.quote(package_name)))
            found = self._fetch(url, package_name)
            if found:
                return found

def _get_project(self, name):
        # Retrieve the info
        url = compat.urljoin(self.url, 'api/' + name)
        try:
            response, _ = http_retrieve(self.opener, url)
        except urllib3.exceptions.MaxRetryError:
            return None

        if response.status == 200:
            data = json.loads(response.data)
            return dict((v['version'], self._get_distribution(v)) for v in data)
        else:
            self.requirements_not_found.append(name)