How to use the pyquery.pyquery function in pyquery

def autocomplete_check(site_id):
            r = self.client.get(reverse('feedback.sad'), HTTP_USER_AGENT=(
                self.FX_UA % '20.0'), SITE_ID=site_id, follow=True)
            doc = pyquery.PyQuery(r.content)
            form = doc('#feedbackform form')

            assert form
            eq_(form.attr('autocomplete'), 'off')
            print r

def getSHA(url):
    baseurl = '/'.join(url.split('/')[:-1])
    filename = url.split('/')[-1]
    try:
        d = pyquery.PyQuery(urlread(baseurl))
    except LiveUSBError:
        return ''
    checksum = ''
    for i in d.items('a'):
        if 'CHECKSUM' in i.attr('href'):
            checksum = urlread(baseurl + '/' + i.attr('href'))
            break

    for line in checksum.split('\n'):
        i = re.match(r'^SHA256 \(([^)]+)\) = ([a-f0-9]+)$', line)
        if i:
            if i.group(1) == filename:
                return i.group(2)
    return ''

if ex.code == 404: 
                return

            # this is a slight problem, it shouldn't happen but it
            # does sometimes, so keeping tracking is useful to see how
            # often it does happen
            self.failed += 1
            return

        except urllib2.URLError:
            self.failed += 1
            return

        try:
            content = resp.read()
            doc = pq.PyQuery(content)

            # we must do our best to ignore pages that are not
            # relevant (music, movies, other pages that don't have
            # links to apps in them)
            if not self.is_page_valid(url, doc):
                return         

            # I like keeping a log of URLs processed
            sys.stderr.write(url + "\n")

            # fetches links in this page, by regular expressions. 
            # we are interested in app links and publisher links.
            all_links = [
                a.attrib['href']
                for a in doc('a') 
                if re.search(r'\/(details|developer)[?]', a.attrib.get('href', '')) \

def getSpins(url, source):
    d = pyquery.PyQuery(urlread(url))
    spins = []

    for i in d('div').filter('.high').items('span'):
        spinUrl = url + i.siblings()('a').attr('href')
        spin = getSpinDetails(spinUrl, source)
        spin['summary'] = i.html()
        spins.append(spin)

    return spins