human
Complete this python program:
def login(request, browser, app, attempt=1):
assistant
#Here is the Python code you requested.

    """Runs for each provider.
    """
    success = False
    (provider_name, provider) = request.param
    log(1, provider_name, 'Attempt    {0}'.format(attempt))
    def wait(indent, seconds):
        seconds = (seconds or 0)
        seconds = (seconds * config.WAIT_MULTIPLIER)
        if (seconds < config.MIN_WAIT):
            seconds = config.MIN_WAIT
        if seconds:
            log(indent, provider_name, u'(waiting    {0}    seconds)'.format(seconds))
            time.sleep(seconds)
    def human_interaction_needed(xpath, seconds=0):
        log(2, provider_name, 'Checking    if    human    interaction    is    needed')
        try:
            wait(2, seconds)
            el = browser.find_element_by_xpath(xpath)
            if el.is_displayed():
                print 'Human    interaction    is    needed    (captcha    or    similar)!'
                print 'Go    to    the    browser,    do    the    interaction    and    hit    "c".'
                if os.environ.get('TRAVIS'):
                    message = 'Human    interaction    needed,    but    not    possible    on    Travis    CI!'
                    log(3, provider_name, message)
                    pytest.fail(message)
                    return
                log(3, provider_name, 'Entering    PDB    for    human    interaction')
                import pdb
                pdb.set_trace()
                log(3, provider_name, 'Returned    from    PDB')
                return
        except NoSuchElementException:
            pass
        log(3, provider_name, 'Not    needed')
    try:
        provider['name'] = provider_name
        conf = fixtures.get_configuration(provider_name)
        url = parse.urljoin(app.check_url, ('login/' + provider['_path']))
        login_url = provider.get('login_url')
        login_xpath = provider.get('login_xpath')
        password_xpath = provider.get('password_xpath')
        pre_login_xpaths = provider.get('pre_login_xpaths')
        if login_url:
            log(2, provider_name, 'Going    to    login    URL:   ...