Python: How to call class method from imported module? "Self" argument issue -

i have 2 files. know how call function, cant understand how call method imported module has "self" 1st argument.

i got error:

typeerror: prepare() missing 1 required positional argument: 'url'

cinemas.py      import requests lxml.html import fromstring  class cinemas_info():      def __init__(self, url):         self.basic_cinemas_info(url)      def prepare(self, url):           url = requests.get(url)         tree = fromstring(url.text)         tree.make_links_absolute(url.url)         return tree      def basic_cinemas_info(self, url):           tree = self.prepare(url)          city in tree.xpath(".//div[@class='city-caption']"):             city1 = city.xpath("text()")[0]             cinema in city.xpath("following-sibling::*[1]/li/a"):                 name1 = cinema.xpath("text()")[0]                 detailed_url = cinema.xpath("@href")[0]                 print (city1.strip(), name1.strip(), ':')                 self.detailed_cinemas_info(detailed_url)                 self.detailed_cinemas_films(detailed_url)      def detailed_cinemas_info(self, url):           tree = self.prepare(url)          street in tree.xpath(".//div[@class='address']"):             street1 = street.xpath("text()")[0]             phone in tree.xpath(".//div[@class='phone']"):                 phone1 = phone.xpath("text()")[0]                 website in tree.xpath(".//div[@class='website']/a"):                     website1 = website.xpath("@href")[0]                     print ('\t', street1.strip(), phone1.strip(), website1.strip())      def detailed_cinemas_films(self, url):           showtimes_tab_url = '/showtimes/#!=&cinema-section=%2fshowtimes%2f'         tree = self.prepare(url + showtimes_tab_url)          film in tree.xpath('//div[@class="content"]'):             film_name = film.xpath('.//a[@class="navi"]/text()')[0]             dates in film.xpath('.//li[contains(@class,"showtimes-day sdt")]'):                 film_dates = dates.xpath('.//div[@class="date"]/text()')[0]                 times in dates.xpath('.//ul[@class="showtimes-day-block"]/li'):                     film_times = times.xpath('a/text()')                      if len(film_times) == 0:                         film_times = none                      is_3d = times.find('span')                     if film_times not none:                         if is_3d not none:                             print(film_dates, film_name, film_times[0], '3d')                         else:                             print(film_dates, film_name, film_times[0])  if __name__ == "__main__":     cinemas_info('http://vkino.com.ua/cinema/#!=') 

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#films.py  import requests cinemas import cinemas_info  def films_list():     url = 'http://vkino.com.ua/afisha#!='     tree = cinemas_info.prepare(url) #  <<<----here call      films in tree.xpath('//*[@id="content"]/div/div[1]/ul[2]/li'):         film_name = films.xpath('.//div[@class="title"]/a/text()')[0]         film_url = films.xpath('.//div[@class="title"]/a/@href')[0]         print(film_name, film_url)  if __name__ == "__main__":     films_list() 

i know can move "def prepare" out of class , remove "self" argument, want know, right way call "def prepare" inside of class.

since definition of prepare has self in it, can call method either on instance of cinemas_info or passing instance of , url prepare().

so need create instance of cinemas_info class , python pass instance prepare(). need pass url.

#films.py  import requests cinemas import cinemas_info  def films_list():     url = 'http://vkino.com.ua/afisha#!='     c_info = cinemas_info(url) # created instance of cinemas_info     tree = c_info.prepare(url) # can call prepare() on instance      films in tree.xpath('//*[@id="content"]/div/div[1]/ul[2]/li'):         film_name = films.xpath('.//div[@class="title"]/a/text()')[0]         film_url = films.xpath('.//div[@class="title"]/a/@href')[0]         print(film_name, film_url)  if __name__ == "__main__":     films_list()