Python : How to get a list of all URLs on some domain crawling from page to page on that domain?

Crawler.py

import bs4 as bs
import urllib.request
import time

def filter_to(input_list,limit_to):
    res = []
    for i in input_list:
        if i is not None:
            if limit_to in i:
                res.append(i)
    return res

visited = {}

def Crawl(urls_list = ['https://www.x.si/'], limit_to = 'https://www.x.si/'):
    res = []
    one_is_to_visit_for_sure = False
    for page in urls_list:
        if page not in visited:
            print("Visiting page : " + page)
            time.sleep(1)
            try:
                sauce = urllib.request.urlopen(page).read()
                soup = bs.BeautifulSoup(sauce, 'lxml')
            except:
                soup = False
            if soup != False:
                for url in soup.find_all('a'):
                    new_url = url.get('href')
                    if new_url not in visited:
                        res.append(new_url)
                        one_is_to_visit_for_sure = True
                visited[page] = True;
            res = filter_to(res, limit_to)
    if one_is_to_visit_for_sure:
        return Crawl(res, limit_to)
    return res
print("----")
resx = Crawl(limit_to = 'https://somedomain.xyz/')
print("DONE")