https://github.com/wgnet/webium/issues/6 workaround

webium_workaround.py

# -*- coding: utf-8 -*-
from webium import settings
from webium import driver as webium_driver_hack
from webium import BasePage
from selenium.webdriver.common.by import By
from webium import Find, Finds
from selenium.webdriver.remote.webelement import WebElement
from selenium import webdriver
import time


class DropList(WebElement):
    button = Find(by=By.XPATH, value=".//*[@type='button']")
    drop_list = Finds(by=By.XPATH, value=".//li/a")

    def set_pass(self, value):
        self.button.click()
        self.drop_list[value - 1].click()

class BasePageMy(BasePage):
    settings.default_search_type = By.XPATH

    def __init__(self, url):
        BasePage.__init__(self, Driver.get(), url)

    def get_title(self):
        return Driver.get().title


class Search(BasePageMy):
    """ Страница 'Поиск' """
    passanger_aaa = Find(ui_type=DropList, value=".//*[@class='btn-group bootstrap-select form-control pass-count-select pass-type-select-base-category-count']")
    show_children = Find(value=".//*[@id='showChildCountersBut']")


    info_flight_list = {}
    page_url = "http://tst.sirena-travel.ru/oxygen"

    def __init__(self):
        BasePageMy.__init__(self, self.page_url)
        self.open()
        print (u"Открылась страница %s" % self.get_title())
    def pax(self, AAA=2):
        """ Функция для задания количества пассажиров """
        self.show_children.click()
        if AAA != 1:
            self.passanger_aaa.set_pass(AAA)

class Driver(object):
    _instance = None
    @classmethod
    def get(cls):
        if not getattr(cls, '_instance'):
           cls._instance = webdriver.Firefox()
           webium_driver_hack._driver_instance = cls._instance
        return cls._instance

    @classmethod
    def close(cls):
        if getattr(cls, '_instance'):
            cls.get().close()
            cls._instance = None

if __name__ == "__main__":
    SearchPage = Search()
    time.sleep(2)
    SearchPage.pax(AAA=2)
    time.sleep(5)
    Driver.get().close()